Recent advances in jet ejectors operating under static conditions have produced high thrust augmentation that is feasible for application to V/STOL flight. However, because of (a) loss in augmentation in duct flow, (b) ramjet effect, and (c) space limitations, high performance and compactness are required in the design of thrust-augmenting ejectors for V/STOL aircraft. An analytical inverse approach is presented in which the pressure distribution along the diffuser wall of an ejector is defined for a given entrance flow condition and the contour of the desired diffusor wall is determined by using a finite difference technique. The prescribed pressure distribution is first optimized by a modified Stratford criterion for incipient separation of turbulent boundary layers; this optimization makes it applicable to compressiable two-dimensional and axisymmetric flows.
Analysis and design of ejector diffusor for optimum thrust
Analyse und Entwurf von Strahldiffusoren fuer die Schuboptimierung
US Government Reports ; 1-31
1976
31 Seiten
Report
Englisch
Diffusor und Kraftfahrzeug mit einem solchen Diffusor
Europäisches Patentamt | 2022
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