Assessment of various low-profile mechanical vortex generators in controlling a shock-induced separation

Verma, SB and Manisankar, C (2017) Assessment of various low-profile mechanical vortex generators in controlling a shock-induced separation. AIAA Journal, 55 (7). pp. 2228-2240. ISSN 00011452

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Abstract

An experimental investigation was conducted to assess the effectiveness of five microvortex generator configurations in controlling an incident shock-induced separation associated with a 14 deg shock generator in a Mach 2.05 flow. The vortex generator configurations studied include the Ashill, Anderson, split-Anderson, trapezoidal, and ramp-vane designs. Each device height h spanned 30% of the local boundary-layer thickness d estimated just upstream of the separation for no control. An array of each control device configuration was implemented 10δ upstream of the separation location for no control. Additionally, one ramp-vane device with h/δ = 0.5 was also tested. Out of all the configurations tested, the ramp-vane device (h/δ = 0.5) shows the maximum downstream shift (21%) in separation location. This device and the split-Anderson configuration (h/δ = 0.3) both show a reduction in the maximum rms values by 26 and 24%, respectively. The study on ramp-vane devices (h/δ = 0.3, 0.5) further shows that the size of the split relative to the device height also seems to be an important parameter. For the ramp-vane devices (h/δ = 0.3, 0.5), a smaller intervane spacing of 1.7h (h/δ = 0.5) instead of 3h (h/δ = 0.3) shows a very effective control. From this perspective, providing a split size of 1h in split-Anderson device has also shown favorable results

Item Type: Article
Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
ENGINEERING > Mechanical Engineering
Depositing User: Mrs SK Pratibha
Date Deposited: 25 Feb 2020 14:27
Last Modified: 25 Feb 2020 14:27
URI: http://nal-ir.nal.res.in/id/eprint/13233

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