Book Description
This digital document is an article from Airpower, published by Sentry Books, Inc. on September 1, 2004. The length of the article is 4765 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Swingin' on a spar: the birth and development of variable--geometry aircraft.
Author: Mike Machat
Publication: Airpower (Magazine/Journal)
Date: September 1, 2004
Publisher: Sentry Books, Inc.
Volume: 34Issue: 9Page: 42(14)

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Product Description
Defines certain notions used for the geometric description of an aircraft for the purpose of flight dynamic studies. Does not give all the definitions that permit the detailed description of the shape of the aircraft. The aircraft is considered to be made up of various components. Defines general characteristics, overall dimensions of the aircraft, ground limit angles, fuselage, aerodynamic surfaces, wing and empennages. Gives figures. ... Read more

Book Description
This digital document is a journal article from Journal of Aerosol Science, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Large spatial-scale atmospheric aerosol characterization is commonly accomplished from high-speed aircraft platforms using subisokinetic sampling. The aspiration efficiencies in these inlets are commonly determined from the empirical correlation of Belyaev and Levin [1974. Techniques for collection of representative aerosol samples. Journal of Aerosol Science, 5, 325-338] (B&L), though the correlation was obtained from experiments under conditions very different from those encountered during high-speed aircraft sampling. Aircraft inlets are generally thick-walled, often have a blunt-body downstream, operate at a large freestream to sampling velocity ratio, and under conditions of low ambient pressures. The dependence of sampling characteristics on these parameters is studied using computational fluid dynamics (CFD) modeling. The CFD calculations show that the anisokinetic inlet sampling characteristics are strongly influenced by the operating conditions and sampler geometry, especially the presence of an aft blunt body. It is observed that these dependencies are not accurately captured by the existing correlations. The presence of even a moderately sized blunt-body aft of a sampling inlet can greatly influence the sampling characteristics of a straight tube inlet. A new correlation is derived based on the CFD simulation results, and this correlation is seen to greatly improve prediction of inlet sampling characteristics considering their geometries. ... Read more