Abstract
Wall pressure measurements are made in a convergent-divergent nozzle with strut injection to estimate the internal forces and moments. The strut facing the flow was of rectangular cross section and is placed at two thirds of the diverging length of the nozzle from the throat. The design exit Mach number of the nozzle is 1.84. The strut height varied at constant internal total pressure of 690 kPa. Experiments were conducted to explore the possibility of using a solid strut as an alternative to secondary fluid injection for thrust vector control. The wall pressure distribution of the nozzle is studied to interpret the flow interaction with the strut. The calculations based on the experimental data show that the presence of the strut and a variation in its height produce significant variations in side force and pitching moment which would be useful for thrust vector control.
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ACKNOWLEDGEMENTS
The authors would like to acknowledge the Council of Scientific and Industrial Research (CSIR), New Delhi, India, vide Sanction ACK no. 141438/2K15/1 for providing financial support to the first author to carry out the Research work. The authors are thankful to the members of the laboratory for their help during this study.
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Srinivas, A.L., Sridhar, B.T. Experimental Study of the Wall Pressure Distribution in a Convergent-Divergent Nozzle with Strut Injection. Fluid Dyn 55, 279–290 (2020). https://doi.org/10.1134/S0015462820010139
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DOI: https://doi.org/10.1134/S0015462820010139