Effects of Cavity on the Performance of Dual Throat Nozzle During the Thrust-Vectoring Starting Transient Process

The dual throat nozzle (DTN) technique is capable to achieve higher thrust-vectoring efficiencies than other fluidic techniques, without compromising thrust efficiency significantly during vectoring operation. The excellent performance of the DTN is mainly due to the concaved cavity. In this paper,...

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Bibliographic Details
Published inJournal of engineering for gas turbines and power Vol. 136; no. 1; p. 0145021
Main Authors Gu, Rui, Xu, Jinglei
Format Journal Article
LanguageEnglish
Published United States 01.01.2014
Subjects
CFD
jet
dual throat nozzle
unsteady flows
internal flow
thrust vectoring
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Summary:The dual throat nozzle (DTN) technique is capable to achieve higher thrust-vectoring efficiencies than other fluidic techniques, without compromising thrust efficiency significantly during vectoring operation. The excellent performance of the DTN is mainly due to the concaved cavity. In this paper, two DTNs of different scales have been investigated by unsteady numerical simulations to compare the parameter variations and study the effects of cavity during the vector starting process. The results remind us that during the vector starting process, dynamic loads may be generated, which is a potentially challenging problem for the aircraft trim and control.
ISSN:0742-4795
DOI:10.1115/1.4025243