Effects of micro-vortex generators on shock wave structure in a low aspect ratio duct, numerical investigation

Bagheri, Hadi; Mirjalily, Seyed Ali Agha; Oloomi, Seyed Amir Abbas; Salimpour, Mohammad Reza

doi:10.1016/j.actaastro.2020.08.012

Cited by 32 publications

(4 citation statements)

References 43 publications

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“…The high-energy vortex was generated at the tail of VGs and could suppress the flow separation. VGs had a wide range of applications (Bagheri et al, 2021; Ramanathan et al, 2019; Rao et al, 2020; Skrzypiński et al, 2020; Zeng et al, 2019). Skrzypiński et al (2020) analyzed the effect of the retrofitting VGs on the blades of the megawatt-sized wind turbine.…”

Section: Methodsmentioning

confidence: 99%

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Chen

Wang

et al. 2021

Wind Engineering

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The transition area of the blade had a large relative thickness of airfoil, which was prone to the flow separation. The vortex generators (VGs) could restrain the flow separation. In this paper, the VGs were installed at the transition area of the WindPACT 1.5 MW wind turbine blades. The numerical simulation method was used to investigate the effects of the VGs on the aerodynamic performance of the blade. The high-energy vortexes were generated at the tail by the VG. It could change the energy distribution and flow characteristics of the airflow in the boundary layer. There were influences by the geometric parameters of the VGs. The VGs could change the aerodynamic performance at the transition area of the blade. A satisfactory result was obtained for reasonable geometrical parameters of the VGs. It also could restrain the flow separation of the blade surface and improve the torque.

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Section: Methodsmentioning

confidence: 99%

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Chen

Wang

et al. 2021

Wind Engineering

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“…Depending on whether the control device is adjustable, the control methods for SWBLI could be divided into passive control and active control, including vortex generators (Titchener and Babinsky, 2013), bump (Zhang et al, 2019), boundary layer bleed (Bagheri et al, 2021), plasma actuation (Yang et al, 2022) and other control methods. These control methods were proven effective in specific situations.…”

Section: Introductionmentioning

confidence: 99%

Numerical studies on shock wave and boundary layer interaction in the high-load turbine rotor cascades

Long,

Qi,

et al. 2024

J. Glob. Power Propuls. Soc.

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Design of transonic high-load turbine is the essential approach to improve thrust-to-weight ratio of gas turbine engines. The shock wave and boundary layer interaction (SWBLI) in high-load turbine is one of the important unsteady sources and the main source of loss in turbine stages. In order to study mechanism of SWBLI in high-load turbine, rotor blades with loading coefficients range from 1.6 to 2 were designed and Delayed Detached Eddy Simulations (DDES) were carried out. The influences of loading coefficient, exit isentropic Mach number and incidence angle on characteristics of shock wave, SWBLI as well as flow details in the blade passages were compared. Results indicated the shock wave was generated and enhanced as exit isentropic Mach numbers increased leading to the increase of 2.8% in the total pressure loss coefficient. There was not significant difference in the total pressure loss coefficient as loading coefficient increased, however the shock wave was stronger and the separation bubble was longer at the loading coefficient of 1.6. Meanwhile, the influence of strong separation near the leading edge of suction surface induced by variation of incidence angles on the characteristics of the shock wave and the loss was also obvious.

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“…For passive control of shock Wave/boundary-layer interactions, vortex generators are researched by both theoretical and experimental methods by researchers [3,4]. The exact methods by which they operate at high speeds are still a debate [5,6].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of vortex generators designed for utility vehicles

2023

Archives of Thermodynamics

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The main goal of today's car designers is to minimize fuel consumption in all possible ways at the same time maintaining the vehicle's performance as usual. The goal of this work is to study the effect of adding a vortex generator (VG) on the aerodynamics of the vehicle and fuel economy. Both theoretical and experimental works were carried out and the outcomes of the numerical simulations are contrasted with those of the experimental results. A utility vehicle model with a scale ratio of 1:15 was used as a test model. Experimental research has been done on the fluctuation of the coefficient of pressure, dynamic pressure, and coefficients of lift and drag with and without VG on the roof of a utility vehicle. The delta-shaped VG was put to the test both numerically and experimentally. At a velocity of 2.42 m/s, it is observed that the addition of VG can raise the pressure coefficient by about 17%. When compared to the vehicle model without vortex generators, the velocity profile of the ccomputational fluid dynamics analysis shows that at the back end of the vehicle, the wake has been minimized with VG.

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Effects of micro-vortex generators on shock wave structure in a low aspect ratio duct, numerical investigation

Cited by 32 publications

References 43 publications

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Investigate aerodynamic performance of wind turbine blades with vortex generators at the transition area

Numerical studies on shock wave and boundary layer interaction in the high-load turbine rotor cascades

Experimental and numerical analysis of vortex generators designed for utility vehicles

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