Experimental study on the flow field and aeroheating characteristics induced by a combinational aerospike and multi-jet scheme in large angle of attack

Yuan, Ye; Cao, Zhanwei; Fu, Bin; Zhang, Xiao; Nie, Chunsheng; Chen, Xin; Li, Ruiqu

doi:10.1016/j.ijheatmasstransfer.2022.123131

International Journal of Heat and Mass Transfer

2022

DOI: 10.1016/j.ijheatmasstransfer.2022.123131

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Experimental study on the flow field and aeroheating characteristics induced by a combinational aerospike and multi-jet scheme in large angle of attack

Ye Yuan

Zhanwei Cao

Bin Fu

et al.

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2024

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Cited by 2 publications

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Angle-of-attack characteristics of opposing jet for improving drag and heat reduction

Xu,

Li,

Ren

2024

Physics of Fluids

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While the opposing jet technique has the potential to achieve efficient drag and heat reduction, it can be severely affected by the incoming angle of attack. To analyze the angle-of-attack characteristics of opposing jet for improving drag and heat reduction, a three-dimensional blunt model was studied under various jet stagnation pressure ratios and angles of attack using the verified numerical method. The results showed that the enhanced reattachment shock on the windward side resulted in a higher pressure and temperature rise, which led to the deterioration of drag and heat reduction. Under the influence of the incoming angle of attack, the recirculation vortex transformed into a longitudinal vortex, resulting in a slanted U-shaped distribution of the surface pressure coefficient and Stanton number. Increasing the jet stagnation pressure ratio widened the coverage of the recirculation vortex on both the windward and leeward sides, which brought an improvement in drag and heat reduction. The interaction between the incoming angle of attack and the opposing jet caused a double-peak distribution of Stanton number due to the recirculation vortex reattachment and the compression of the incoming flow. The inclined opposing jet could reduce the peak values of pressure coefficient and Stanton number when subjected to the incoming flow with an angle of attack by spreading the recirculation vortex along the windward side. There should exist an optimal inclination angle that can effectively reduce the peak caused by the compression of the incoming flow without generating an excessive peak due to the recirculation vortex reattachment.

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Angle-of-attack characteristics of opposing jet for improving drag and heat reduction

Xu,

Li,

Ren

2024

Physics of Fluids

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Mechanism of active flow control using a novel spike aerodome-channel concept in the hypersonic flow: A numerical study

Meng,

Wang,

Huang

et al. 2024

Physics of Fluids

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Among the design requirements of hypersonic vehicles, reducing aerodynamic heating and drag force simultaneously is the main challenge. This paper proposes a novel spike aerodome-channel combination concept to realize the flow field reconstruction around the hypersonic blunt body. The novel configuration is investigated in the axisymmetric flow at a Mach number of 6 at zero angle of attack. The two-dimensional Reynold-averaged Navier–Stokes equations are numerically solved, and the shear-stress transport k–ω model is the turbulence model implemented in this study. Parameters such as spike length and lateral jet location are investigated to explore the drag and heat reduction performance and the flow control features. The obtained results show that the application of the novel spike aerodome-channel concept alters the flow field by eliminating or replacing the strong bow shock wave, and the design of hypersonic vehicles can benefit from the application of the proposed concept. The blunt body coupled with a frustum of cone-tipped spike-channel configuration provides a remarkable drag reduction effect of 20.71% with respect to the case without channel. Considering the effect of lateral jet location, the drag reduction performance of the case with LR = 0.75 is superior to that of the root jet case at the same spike length, and a considerable drag reduction of 28.93% is obtained with L/D = 2.4. In addition, longer spike length is beneficial for improving drag reduction performance, while excellent efficiency of heat protection is obtained in a certain spike length range. For the case of L/D = 1.6 with root jet, the peak Stanton number is significantly decreased by 33.51%.

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Experimental study on the flow field and aeroheating characteristics induced by a combinational aerospike and multi-jet scheme in large angle of attack

Cited by 2 publications

References 45 publications

Angle-of-attack characteristics of opposing jet for improving drag and heat reduction

Angle-of-attack characteristics of opposing jet for improving drag and heat reduction

Mechanism of active flow control using a novel spike aerodome-channel concept in the hypersonic flow: A numerical study

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