Journal
PHYSICS OF FLUIDS
Volume 34, Issue 10, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0121553
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Funding
- Aeronautical Research and Development Board (ARDB) of India
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This experimental investigation examines the effect of an array of inclined co-rotating vanes on a three-dimensional interaction generated by a semi-infinite sharp fin. The study finds that using vanes with a smaller chord length and larger height can effectively control the interaction, reducing pressure and separation shock strength.
This experimental investigation studies the effect of an array of 30 & DEG; inclined co-rotating vanes in controlling a three-dimensional interaction generated by a 15 & DEG; semi-infinite sharp fin at Mach 2.05. The array is located upstream of the quasi-conical and conical zones of interaction. The primary objective is to study variation in (i) vane chord length c/h = 7.2, 4.2, and 2.5 and (ii) vane height h/delta = 0.3, 0.5, and 0.75 for c/h = 2.5 case in controlling the interaction. Control with the smallest chord length of c/h = 2.5 and h/delta = 0.75 shows the most promising result relative to vanes with longer chord lengths. The vortex trails from this configuration penetrate deeply into the quasi-conical zone of interaction, thereby modifying it both azimuthally and radially. The plateau pressure in the conical region of interaction shows a reduction of approximately 60% with an accompanied reduction in the separation shock strength by nearly 70% for this case. Implementing control in either quasi-conical or conical zones reduces the overall control effectiveness considerably. Removing vanes ahead of quasi-conical zone reduces the effectiveness of favorably modifying the flow development in this region. The bow shock formed ahead of the first vane interacts with the three-dimensional interaction creating a pressure jump that separates the region of vortex influence from that of no control. Published under an exclusive license by AIP Publishing.
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