{"id":2770,"date":"2017-05-07T18:20:16","date_gmt":"2017-05-07T15:20:16","guid":{"rendered":"https:\/\/inginerie.aero\/?p=2770"},"modified":"2017-05-26T16:58:18","modified_gmt":"2017-05-26T13:58:18","slug":"ion-stroescu-2","status":"publish","type":"post","link":"https:\/\/inginerie.aero\/index.php\/en\/2017\/05\/07\/ion-stroescu-2\/","title":{"rendered":"Ion Stroescu"},"content":{"rendered":"

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Ion Stroescu was born in Ploie\u0219ti on 13 August 1888. He studied primary and high school in Ploie\u0219ti, then he became a sports teacher at the Central School of Gymnastics in Bucharest. Very early in his youth he became addicted to aviation, especially for aerodynamics. In 1910 he founded an association of aeronautical constructions, where the photo below was taken:<\/p>\n

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Ion Stroescu, Nicolae T\u0103nase, Coreneliu Marinescu and Tache Brum\u0103rescu at 1910, in the new association for promoting the aeronautical constructions (photo: Dan Antoniu).<\/p>\n

In 1925 he published an important book on aerodynamics, New Perspectives in Airplane Aerodynamics<\/em>. The book was handwritten, and reproduced by lithography. In 2013, INCAS published it in facsimile and thus it has been preserved. The depth of the analysis of the physical phenomena indicate a fascinating intuition for aerodynamics.<\/p>\n

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In the same year, he applies for two valuable patents, for controlling the boundary layer by injection-suction and blowing-out\u00a0(patents 11.169\/1925 and 13.677\/1925 Ion Stroescu).<\/span><\/p>\n

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He built his first wind tunnel in 1927 at R\u00e2mnicu S\u0103rat, in the sports room of the high school he was teaching.<\/p>\n

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Illustrations show the blue prints of the Wind Tunnel in R\u00e2mnicu S\u0103rat and photos during construction.<\/span><\/p>\n

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The new Wind Tunnel attracted Prof.\u00a0<\/b><\/span>Elie Carafoli’s<\/span><\/strong>\u00a0<\/span>attention, the well known Romanian aerodynamics expert, the founder of the aeronautical engineering school. He tried to stop the demolition of the tunnel, ordered by the Ministry because it \u201dabusively\u201d occupied the sports room. He did not managed that, but managed instead to get an order for Ion Stroescu to be assigned at the Politechnical School.<\/span><\/p>\n

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In 1929 Carafoli appointed Stroescu as assistant professor at the Department of Aerodyanmics. Under his supervision, Ion Stroescu designed and managed the works for the new Wind Tunnel of Polizu.<\/span><\/p>\n

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In the experimental section of the tunnel, the models of all Romanian airplanes were to be tested. The room was equipped with an aerodynamic strain cage, another invention, which demonstrate the creativity of the Romanian pioneers of aerodynamics.<\/p>\n

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On 7 May 1931, King Carol the 2nd, together with Prince Nicolae, with Prime Minister Nicolae Iorga and with the Rector of the Politechnical School, Nicolae Vasilescu-Karpen inaugurate the most important Wind Tunnel in South-East Europe, and one of the most advanced and well equipped in Europe at the time.<\/p>\n

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We may easily recognize the \u201dGrand Amphitheatre of the School\u201d, currently known as the F024 Acad. Virgiliu N. Constantinescu Amphitheatre of the Faculty of Aerospace Engineering. The Wind Tunnel in Polizu contributed to the relative superiority of the Romanian aeronautical industry before and during WWII. Hundreds of new aircraft designs, wing airfoils and other parts could be tested. Some of the aircraft designed in this Wind Tunnel were matching the performance at the highest standards worldwide, competing with American, British or German aircraft.<\/span><\/p>\n

In 1937 Ion Stroescu got another assignment, with the Faculty of Sciences of the University of Bucharest, by the Laboratory of Prof. Victor V\u00e2lcovici, who was PhD in aerodynamics from the school of the well known scientist Ludwig Prandtl (1931).<\/span><\/p>\n

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Ludwig Prandtl visited the Politechnical School in 1941, particularly to see the Wind Tunnel in Polizu. In the picture, from left to right: C.C. Teodorescu, Elie Carafoli, Ludwig Prandtl, Dionisie Germani, Victor V\u00e2lcovici, Lucius Saveanu, Ion C\u00e2rstoiu and Nicolae Tipei.<\/span><\/p>\n

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On the stairs of the tunnel, in this photo there are C. C. Teodorescu, Ludwig Prandtl and Dionisie Germani.<\/p>\n

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The experimental results at the end of an intense effort under the supervision of Prof. V\u00e2lcovici, and later (after 1941) with the participation of the young mathematician Ion \u0218abac, the Wind Tunnel in Polizu and its creator Stroescu get an international recognition.<\/span><\/p>\n

In 1943, Ion Stroescu’s presentation at the Research Academy in Berlin attracted appreciative remarks by Professors Ludwig Prandtl and A. Betz.<\/span><\/p>\n

In 1946 at the Fourth Congress of Applied Mechanics, Ion Stroescu presents at Sorbone the paper \u201cA New Type of Wind Tunnel\u201d.<\/span><\/p>\n

\u201cProf. Edmond Brun\u00a0requested permission to use the blue prints of the Bucharest Wind Tunnel to build a similar one at Sorbone<\/span><\/em>\u201d (Prof. V.\u00a0<\/span>V\u00e2lcovici).<\/span><\/i><\/p>\n

Ion Stroescu stayed in France for 14 months, where he designed a special icing wind tunnel at Bellevue (ONERA).<\/p>\n

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Wind Tunnel ONERA of Bellevue, France, designed by Ion Stroescu<\/p>\n

In 1948, Ion Stroescu returned to Romania and worked at the Institute of Applied Mechanics of the Academy. In this capacity, he designs and builds the subsonic wind tunnel of the Militari Platform (INCAS).<\/p>\n

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In 1960, Ion Stroescu was celebrated for the 70th anniversary and for 50 years of activity in aeronautics, at the Romanian Academy, by Acad. Elie Carafoli, Acad. Victor V\u00e2lcovici, Acad. Dumitru Dumitrescu and Prof. Nicolae Tipei. On the occasion, he was recognized as an inventor and pioneer in experimental aerodynamics, as the leader of the Romanian aerodynamics.<\/p>\n

Ion Stroescu died in 1961.<\/p>\n

(This article was adapted after the presentations of Prof. Sterian D\u0103n\u0103il\u0103, using original materials of the \u201dElie Carafoli\u201d Department of Aerospace Sciences, and using the paper of\u00a0Conf. Nicolae \u0218erban Tomescu, \u201dAn important achievement of Professor Ion Stroescu: the wind tunnel of the Polytechnic School of Bucharest\u201d<\/a> published in 2011 in the INCAS Bulletin. Another reference is the paper of Buiu V,\u00a0 Ion <\/i>Stroescu<\/i><\/a> (1888-1961) A Man and a Life \u2013for a passion, INCAS BULLETIN, Volume 3, Special Issue\/ 2011, pp. 1 \u2013 15.<\/i> A significant reference over the entire field is the book \u201dThe History of the Higher Education in Aviation\u201d by Prof. Virgil Stanciu)<\/p>\n

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  Ion Stroescu was born in Ploie\u0219ti on 13 August 1888. He studied primary and high school in Ploie\u0219ti, then he became a sports teacher at the Central School of Gymnastics in Bucharest. Very early in his youth he became addicted to aviation, especially for aerodynamics. In 1910 he founded an association of aeronautical constructions, […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"

[et_pb_section admin_label=\"Section\" fullwidth=\"off\" specialty=\"on\"][et_pb_column type=\"3_4\" specialty_columns=\"3\"][et_pb_row_inner admin_label=\"Row\"][et_pb_column_inner type=\"4_4\" saved_specialty_column_type=\"3_4\"][et_pb_text admin_label=\"Text\" background_layout=\"light\" text_orientation=\"justified\" use_border_color=\"off\" border_color=\"#ffffff\" border_style=\"solid\"]<\/p>

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Ion Stroescu s-a n\u0103scut la Ploie\u0219ti pe 13 august 1888. A f\u0103cut \u0219coala \u0219i liceul \u00een Ploie\u0219ti, apoi a devenit profesor de sport la \u0218coala Central\u0103 de Gimnastic\u0103 din Bucure\u0219ti. Din tinere\u021be a f\u0103cut o pasiune pentru avia\u021bie \u0219i \u00een special pentru aerodinamic\u0103. \u00cen 1910 a fondat o asocia\u021bie de construc\u021bii aeronautice, de la care ni s-a p\u0103strat aceast\u0103 fotografie:<\/p>

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Ion Stroescu, Nicolae T\u0103nase, Coreneliu Marinescu \u0219i Tache Brum\u0103rescu la 1910, \u00een noua asocia\u021bie pentru promovarea construc\u021biilor aeronautice (foto: Dan Antoniu).<\/p>

\u00cen 1925 a publicat o important\u0103 carte de aerodinamic\u0103, Noui Perspective \u00een Aerodinamica Avionului<\/em>. Carte litografiat\u0103 a fost reprodus\u0103 de INCAS \u00een 2013 \u0219i astfel se p\u0103streaz\u0103 \u0219i ast\u0103zi. Profunzimea analizei fenomenelor fizice arat\u0103 o intui\u021bie fascinant\u0103 pentru aerodinamic\u0103.<\/p>

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\u00cen acela\u0219i an ob\u021bine dou\u0103 valoroase brevete de inven\u021bie, pentru controlul stratului limita prin injectie-suctiune la perete (brevet 11.169\/1925 si 13.677\/1925\u00a0 Ion Stroescu).<\/p>

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Primul tunel aerodinamic l-a construit \u00een 1927 la R\u00e2mnicu S\u0103rat, \u00een sala de sport a liceului unde preda.<\/p>

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Se observ\u0103 planurile tunelului din R\u00e2mnicu S\u0103rat \u0219i imagini din timpul construc\u021biei.<\/p>

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Noul tunel aerodinamic a atras aten\u021bia Prof. Elie Carafoli<\/strong>, renumitul aerodinamician rom\u00e2n, fondatorul \u0219colii de inginerie aeronautic\u0103. El a \u00eencercat s\u0103 opreasc\u0103 demolarea tunelului, ordonat\u0103 de minister \u00eentruc\u00e2t ocup\u0103 \u201dabuziv\u201d sala de sport. Nu a reu\u0219it acest lucru, \u00een schimb a ob\u021binut deta\u0219area lui Ion Stroescu la \u0218coala Politehnic\u0103.<\/p>

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\u00cen 1929 l-a numit pe acesta asistent la Catedra de Aerodinamic\u0103. Sub \u00eendrumarea Prof. Elie Carafoli, Ion Stroescu proiecteaz\u0103 \u0219i conduce lucr\u0103rile la tunelul aerodinamic din Polizu.\u00a0Tunelul aerodinamic din Polizu a fost la momentul inaugur\u0103rii lui unul din cele mai avansate laboratoare de aerodinamic\u0103 din lume. Tunelul \u00eengloba un brevet de inven\u021bie \u0219i mai multe inova\u021bii pe plan mondial.<\/p>

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\u00cen camera experimental\u0103 a tunelului aveau s\u0103 fie testate toate modelele de avioane rom\u00e2ne\u0219ti. Camera era dotat\u0103 cu o balan\u021b\u0103 cu cu\u021bite, o alt\u0103 inven\u021bie care demonstreaz\u0103 creativitatea aerodinamicienilor rom\u00e2ni.<\/p>

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Pe 7 mai 1931, Regele Carol al II-lea, \u00eempreun\u0103 cu Principele Nicolae, cu Primul-Ministru Nicolae Iorga \u0219i cu Rectorul \u0218colii Politehnice, Nicolae Vasilescu-Karpen inaugureaz\u0103 cel mai important tunel aerodinamic din Sud-Estul Europei \u0219i unul dintre cele mai moderne \u0219i mai bine dotate din Europa la acea vreme.<\/p>

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Putem recunoa\u0219te u\u0219or \u201dMarele Amfitearu al \u0218coalei\u201d, actualul amfiteatru F024 Acad. Virgiliu N. Constantinescu al Facult\u0103\u021bii de Inginerie Aerospa\u021bial\u0103. Tunelul aerodinamic din Polizu a contribuit la relativa superioritate a industriei aeronautice rom\u00e2ne\u0219ti \u00eenainte \u0219i \u00een timpul celui de-al doilea R\u0103zboi Mondial. Sute de proiecte de noi tipuri de aeronave, profiluri de arip\u0103 sau alte componente au putut fi testate. Unele dintre aeronavele proiectate \u00een acest tunel au avut performan\u021be la cel mai ridicat nivel pe plan mondial, rivaliz\u00e2nd cu aeronave americane, britanice sau germane.<\/p>

\u00een 1937 Ion Stroescu este deta\u0219at la Facultatea de \u0218tiin\u021be a Universit\u0103\u021bii Bucure\u0219ti, la laboratorul Prof. Victor V\u00e2lcovici, care era doctor \u00een aerodinamic\u0103 la \u0219coala reputatului savant Ludwig Prandtl (1931).<\/p>

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Ludwig Prandtl a vizitat \u0218coala Politehnic\u0103 \u00een 1941, \u00een special cu scopul de a vedea tunelul aerodinamic din Polizu. \u00cen imagine, de la st\u00e2nga la dreapta: C.C. Teodorescu, Elie Carafoli, Ludwig Prandtl, Dionisie Germani, Victor V\u00e2lcovici, Lucius Saveanu, Ion C\u00e2rstoiu si Nicolae Tipei.<\/p>

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Pe scara tunelului, se pot vedea \u00een imagine C. C. Teodorescu, Ludwig Prandtl \u0219i Dionisie Germani.<\/p>

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Rezultatele experimentale ob\u021binute printr-un efort intens sub conducerea Prof. V\u00e2lcovici \u0219i dup\u0103 1941 cu participarea t\u00e2n\u0103rului matematician Ion \u0218abac, cap\u0103t\u0103 recunoa\u0219tere interna\u021bional\u0103.<\/p>

\u00cen 1943 prezentarea lui Ion Stroescu la Academia de Cercetare din Berlin a generat aprecieri laudative ale Prof. Ludwig Prandtl si Prof. A. Betz.<\/p>

\u00cen 1946 la al Patrulea Congres de Mecanic\u0103 Aplicat\u0103, Ion Stroescu prezint\u0103 la Sorbona comunicarea \u201cUn nou tip de tunel aerodinamic\u201d.<\/p>

\u201cProf. Edmond <\/i>Brun<\/i> cere<\/i> permisiunea<\/i> de a <\/i>utiliza<\/i> proiectul<\/i> tunelului<\/i> din <\/i>Bucure\u0219ti<\/i> pentru<\/i> a <\/i>construi<\/i> un <\/i>tunel<\/i> similar la <\/i>Sorbona<\/i>\u201d (Prof. V. <\/i>V\u00e2lcovici<\/i>).<\/i><\/p>

Ion Stroescu ramane in Fran\u021ba 14 luni unde proiecteaz\u0103\u00a0un tunel\u00a0special de givraj la Bellevue (ONERA).<\/p>

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Tunelul ONERA de la Bellevue, Fran\u021ba, \u00a0proiectat de Ion Stroescu<\/p>

\u00cen 1948, Ion Stroescu se \u00eentoarce\u00a0\u00een Rom\u00e2nia \u0219i lucreaz\u0103\u00a0la Institutul de Mecanic\u0103\u00a0Aplicat\u0103\u00a0al Academiei. \u00cen aceast\u0103 calitate, proiecteaz\u0103\u00a0\u0219i realizeaz\u0103\u00a0tunelul subsonic de pe platforma Militari (INCAS).<\/p>

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In 1960, Ion Stroescu a fost s\u0103rb\u0103torit la 70 de ani \u0219i 50 de ani de activitate aeronautic\u0103 la Academia Rom\u00e2n\u0103 de Acad. Elie Carafoli, Acad. Victor V\u00e2lcovici, Acad. Dumitru Dumitrescu \u0219i Prof. Nicolae Tipei. Cu acea ocazie, a fost recunoscut ca\u00a0inventator \u0219i deschiz\u0103tor de drumuri \u00een aerodinamica experimental\u0103, lider al aerodinamicii rom\u00e2ne\u0219ti.<\/p>

Ion Stroescu s-a stins \u00een 1961.<\/p>

(Acest articol a fost adaptat dup\u0103 prezent\u0103rile Prof. Sterian D\u0103n\u0103il\u0103, folosind materiale originale ale Departamentului de \u0218tiin\u021be Aerospa\u021biale \u201dElie Carafoli\u201d, utiliz\u00e2nd \u0219i articolul Conf. Nicolae \u0218erban Tomescu, \u201dAn important achievement of Professor Ion Stroescu: the wind tunnel of the Polytechnic School of Bucharest\u201d<\/a> publicat \u00een 2011 \u00een Buletinul INCAS. O alt\u0103 referin\u021b\u0103 este articolul\u00a0Buiu V,\u00a0 Ion <\/i>Stroescu<\/i><\/a> (1888-1961) A Man and a Life \u2013for a passion, INCAS BULLETIN, Volume 3, Special Issue\/ 2011, pp. 1 \u2013 15.<\/i> O referin\u021b\u0103 bibliografic\u0103 important\u0103 asupra \u00eentregului domeniu este cartea \u201dIstoria \u00eenv\u0103\u021b\u0103m\u00e2ntului superior de avia\u021bie\u201d de Prof. Virgil Stanciu)<\/p>

[\/et_pb_text][et_pb_divider admin_label=\"Divider\" color=\"rgba(147,175,193,0.39)\" show_divider=\"on\" divider_style=\"solid\" divider_position=\"top\" hide_on_mobile=\"on\"] [\/et_pb_divider][et_pb_comments admin_label=\"Comments\" show_avatar=\"on\" show_reply=\"on\" show_count=\"off\" background_layout=\"light\" use_border_color=\"off\" border_color=\"#ffffff\" border_style=\"solid\" custom_button=\"off\" button_letter_spacing=\"0\" button_use_icon=\"default\" button_icon_placement=\"right\" button_on_hover=\"on\" button_letter_spacing_hover=\"0\"] [\/et_pb_comments][\/et_pb_column_inner][\/et_pb_row_inner][\/et_pb_column][et_pb_column type=\"1_4\"][et_pb_blog admin_label=\"Blog\" fullwidth=\"off\" include_categories=\"11\" show_thumbnail=\"off\" show_content=\"off\" show_more=\"off\" show_author=\"on\" show_date=\"on\" show_categories=\"off\" show_comments=\"off\" show_pagination=\"on\" offset_number=\"0\" use_overlay=\"off\" background_layout=\"light\" use_dropshadow=\"on\" use_border_color=\"on\" border_color=\"#e5e5e5\" border_style=\"solid\"] [\/et_pb_blog][\/et_pb_column][\/et_pb_section]<\/p>","_et_gb_content_width":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2},"_links_to":"","_links_to_target":""},"categories":[31],"tags":[],"class_list":["post-2770","post","type-post","status-publish","format-standard","hentry","category-uncategorized-en"],"jetpack_publicize_connections":[],"yoast_head":"\nIon Stroescu - Alumni Politehnica Aerospace Engineering<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/inginerie.aero\/index.php\/en\/2017\/05\/07\/ion-stroescu-2\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ion Stroescu - Alumni Politehnica Aerospace Engineering\" \/>\n<meta property=\"og:description\" content=\"  Ion Stroescu was born in Ploie\u0219ti on 13 August 1888. He studied primary and high school in Ploie\u0219ti, then he became a sports teacher at the Central School of Gymnastics in Bucharest. Very early in his youth he became addicted to aviation, especially for aerodynamics. 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