An experimental study on transonic swept convex-corner flows

Kung-Ming Chung, Kao Chun Su

Research output: Contribution to journalArticle

Abstract

An experimental study was conducted to investigate the effect of swept angle on a compressible convex-corner flow. The freestream Mach number and the convex-corner angle were 0.64–0.89 and 10°–17° respectively. The swept angle was 5°–15°. The characteristics of a swept convex-corner flow were evaluated from the distributions of both mean and fluctuating pressures. Surface oil flow visualization was also performed to determine the length of shock-induced separated boundary layer. Shock excursion phenomenon was detected by pressure trace and the shock zero-crossing frequency was evaluated using a two-threshold method. A delay in transition from subsonic to transonic expansion flow for a swept case is observed. The effect of swept angle on peak pressure fluctuations and shock Strouhal number is evident.

LanguageEnglish
Pages565-569
Number of pages5
JournalAerospace Science and Technology
Volume84
DOIs
Publication statusPublished - 2019 Jan 1

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Strouhal number
Flow visualization
Mach number
Boundary layers
Oils

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Cite this

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abstract = "An experimental study was conducted to investigate the effect of swept angle on a compressible convex-corner flow. The freestream Mach number and the convex-corner angle were 0.64–0.89 and 10°–17° respectively. The swept angle was 5°–15°. The characteristics of a swept convex-corner flow were evaluated from the distributions of both mean and fluctuating pressures. Surface oil flow visualization was also performed to determine the length of shock-induced separated boundary layer. Shock excursion phenomenon was detected by pressure trace and the shock zero-crossing frequency was evaluated using a two-threshold method. A delay in transition from subsonic to transonic expansion flow for a swept case is observed. The effect of swept angle on peak pressure fluctuations and shock Strouhal number is evident.",
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An experimental study on transonic swept convex-corner flows. / Chung, Kung-Ming; Su, Kao Chun.

In: Aerospace Science and Technology, Vol. 84, 01.01.2019, p. 565-569.

Research output: Contribution to journalArticle

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