Numerical Investigation of the Circumferential Angle of the Axisymmetric Bypass Dual Throat Nozzle

Document Type : Research Paper

Authors

1 Ph.D., Department of Aerospace Engineering, K. N. Toosi University of Technology, Tehran, Iran

2 Assistant Professor, Department of Aerospace Engineering, K. N. Toosi University of Technology, Tehran, ran

Abstract

One of the modern concept of Fluidic Thrust Vectoring (FTV) is the
Bypass Dual Throat Nozzle (BDTN). In the present work this nozzle with
a circular cross-section which is called ABDTN has been studied
numerically. In this method a bypass channel separates the main nozzle
flow into two parts as a primary and secondary flow from upstream of
the nozzle throat. The results of the interaction between the main nozzle
flow and the bypass channel flow are investigated as a secondary
injection. The present work discusses about the performance
parameters of the ABDTN, including thrust deflection angle, resultant
thrust ratio, discharge coefficient, and thrust vectoring efficiency over
a range of nozzle pressure ratios (NPR) to obtain the effects of different
circumferential angles (α) of the bypass channel. The results of
increasing α show that the maximum deflection angle will decrease from
24º to 21º at the nozzle pressure ratio of 1.5.

Keywords

Main Subjects


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