A theoretical analysis of jet deflection from plane and axisymmetric curved obstacles.

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Authors
Hiriart Le-Bert, Gerardo
Subjects
jets
curved obstacles
jet deflection
thrust reversers
potential flow with free surfaces
finite element analysis of axisymmetric jet deflection
Advisors
Sarpkaya, T.
Date of Issue
1973-12
Date
December 1973
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A class of analytical and numerical solutions to the problem of inviscid-jet deflection from plane and axisymmetric concave surfaces are presented. The methods of solution for the two-dimensional cases included a novel method developed in the present investigation, as well as those due to Levi-Civita and Riemann and Hilbert. These methods have provided indirect solutions for the shape of the curved solid boundary in terms of a given jet-departure and jet-deflection angle. The axisymmetric cases, namely, the deflection of axisymmetric jets from hemispherical thrust reversers are solved directly through the use of the finite element method and a novel iteration scheme. The real-fluid effects on the jet deflection are estimated by comparing the results with those obtained experimentally. The analytical and numerical methods developed or used herein are sufficiently general to yield direct and indirect solutions for more general nozzle and curved-reverser combinations of special interest to thrust reversal on aircraft engines.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
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Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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Copyright is reserved by the copyright owner
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