Characteristics of open cavity flow with floor inclinations at M = 2.0. (July 2021)

• Record Type: Journal Article
• Authors: Saranyamol, VS; Kumar, Priyank; Das, Sudip
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 235:Number 9(2021)
• Page Start: 1118
• Page End: 1126
• Publication Date: 2021-07
• Subjects: Supersonic cavity -- open cavity -- cavity floor inclination -- trapezoidal cavity; Aeronautics -- Periodicals; Astronautics -- Periodicals; Airplanes -- Design and construction -- Periodicals; Aerospace industries -- Periodicals; 629.1
• DOI: 10.1177/0954410020966493
• Languages: English
• ISSNs: 0954-4100

Abstract

Experimental studies on open cavity flows at supersonic speed of M = 2.0 were carried out. Oil flow visualization tests were made to understand the steady features of the surface flow field. Unsteady pressure measurements were done at five locations inside the cavity and pressure spectrum of these measurements were obtained. Cavity floor was made inclined to influence the flow directing towards the cavity leading edge with both, a favourable and adverse slope, by giving a positive and negative inclination angles to the floor, respectively. It is observed that the negative inclinations to the cavity floor behaves in a similar way to the base cavity, but a positive inclination helps to reduce the fluctuating pressures by 80% and reduce OASPL to the order of 14 dB and more.