{"id":558988,"date":"2024-11-05T18:22:37","date_gmt":"2024-11-05T18:22:37","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/esdu-900202009\/"},"modified":"2024-11-05T18:22:37","modified_gmt":"2024-11-05T18:22:37","slug":"esdu-900202009","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/esdu\/esdu-900202009\/","title":{"rendered":"ESDU 90020:2009"},"content":{"rendered":"

INTRODUCTION<\/strong><\/p>\n

This Item provides a simple theoretically-based method for
\npredicting the airframe-induced upwash at any point in the
\nflowfield ahead of the wing at subsonic speeds. The airframe can be
\nconsidered to consist of "wing-like", essentially planar, lifting
\ncomponents, and "body-like", essentially non-lifting, components.
\nThe method, detailed in Section 3, consists of a means of
\npredicting the upwash due to these two classes of airframe
\ncomponent in isolation, together with an approximate means whereby
\naccount is taken of interference effects between the various
\ncomponents. The method is therefore capable of application to a
\nwide range of airframe configurations.<\/p>\n

The method, commonly called the "Yaggy-Rogallo" method, although
\noriginally developed for application to the propeller vibration and
\nflutter problem (Derivation 4), is applicable to any area requiring
\na knowledge of upwash flow fields. Such areas could include jet
\nengine inlet flows, the local flow around canards, boom-mounted
\nsensors and fuselage-mounted or underwing-mounted stores, for
\nexample.<\/p>\n

The applicability and accuracy of the method are discussed in
\nSection 4. In particular, Section 4.2.3 describes two extremes of
\napplication for which the method has already been used. The
\nDerivation and References are given in Section 5 and worked
\nexamples illustrating two of the many possible uses of the method
\nare provided in Section 6. Material supporting the implementation
\nof the method is given in Appendices A, B and D. Details of a
\ncomputer program for the method, ESDUpac A9020, are given in
\nAppendix C.<\/p>\n","protected":false},"excerpt":{"rendered":"

Airframe-induced upwash at subsonic speeds<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ESDU<\/b><\/a><\/td>\n2009-03-01<\/td>\n86<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":558995,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2675],"product_tag":[],"class_list":{"0":"post-558988","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-esdu","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/558988","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/558995"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=558988"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=558988"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=558988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}