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A Study on the Supersonic Flow Characteristics Through a Dual Throat Nozzle  

Shin, Choon-Sik (안동대학교 대학원 기계공학과)
Kim, Heuy-Dong (안동대학교 기계공학과)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.14, no.5, 2010 , pp. 1-7 More about this Journal
Abstract
Dual throat nozzle(DTN) is recently attracting much attention as a new concept of the thrust vectoring technique. This DTN is designed with two throats, an upstream minimum and a downstream minimum at the nozzle exit, with a cavity in between the upstream throat and exit. In the present study, a computational work has been carried out to analyze a fundamental performance of a dual throat nozzle(DTN) at various nozzle pressure ratios(NPR) and throat area ratios. Two-dimensional, axisymmetric, steady, compressible Navier-Stokes equations were solved using a fully implicit finite volume scheme. NPR was varied in the range of NPR from 2.0 to 10.0, at different throat area ratios. The present computational results were validated with some experimental data available. Based upon the present results, the performance of DTN is discussed in terms of the discharge coefficient and thrust efficiency.
Keywords
Compressible Flow; Dual Throat Nozzle; Thrust Vector Control; Shock Wave; Supersonic Flow;
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