Experimental Investigation of the Influence of Transverse Dual protuberances on the Thrust Vector of a Supersonic C-D nozzle

علوم کاربردی و محاسباتی در مکانیک

Article 10, Volume 31, Issue 1 - Serial Number 21, February 2020, Pages 139-154   

Document Type: Original Article

DOI: 10.22067/fum-mech.v31i1.82370

Author

Mohammad Reza Babaeyan

Najafabad Branch, Islamic Azad University

Abstract

In this study, effects of the use of dual transverse protuberances (DTP) as a new, low cost and simple method in controlling the thrust vector in a C-D  nozzle, whose nominal Mach number is 2, was investigated. The protuberances used are two cylindrical shapes that are placed in front of the flow in the divergence part of  nozzle. Protuberances are installed in 80% of the length of the nozzle divergence section from nozzle throat, transversely and at a 45° angle to each other. The flow field was investigated by schlieren imaging, along with measuring the pressure distributions on the nozzle walls. The results show that using the DTP in the nozzle can increase the angle of the thrust vector to 3.5 degrees in the examined conditions. Also,it can be achived in compare to using a single protobrance with lower thrust loss up to 5.5%.

Keywords

TVC; C-D Nozzle; Supersonic Flow; Protuberance; Experimental Aerodynamics

Supplementary Files

EA10-hojaji-Nahayi.pdf

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