An experimental investigation on combined sublimation and transpiration cooling for sintered porous plates

Wu, Nan; Wang, Jianhua; Dong, Wenjie; Ding, Rui

doi:10.1016/j.ijheatmasstransfer.2017.09.062

Cited by 24 publications

(2 citation statements)

References 23 publications

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“…We used the heat transfer from the high temperature gas to the DHSV-bio-FS specimen to verify the thermal protection performance of DHSV-bio-FS [ 24 , 25 , 39 , 40 ]. The thermal testing of the DHSV-bio-FS was conducted in a wind tunnel (Fig.…”

Section: Methodsmentioning

confidence: 99%

Thermal Protection Performance of Biomimetic Flexible Skin for Deformable High-Speed Vehicles (DHSV-bio-FS) under Uniaxial Tensile Strain

Yuan,

Lü,

Bao

2024

Research

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Vehicle skin is the key component in maintaining the aerodynamic shape of the vehicle. A deformable high-speed vehicle needs to adjust its shape in real time to realize optimum aerodynamic efficiency and to withstand extreme heat flow induced by high-speed flight, which requires the skin to possess large strain and high-temperature resistance. Traditional vehicle skin cannot satisfy both of the requirements. Biomimetic flexible skin for deformable high-speed vehicles (DHSV-bio-FS) combines flexible material fabrication with transpiration cooling technology, which can simulate human skin sweat cooling, and has the characteristics of large strain and high-temperature resistance. The thermal protection performance of the prepared prototype of DHSV-bio-FS was evaluated by simulation and wind tunnel experiments at 40% tensile strain with liquid water as coolant. Simulation results suggest that the surface temperature of the DHSV-bio-FS at 40% tensile strain is consistent with the temperature of the coolant (350 K) in a 3,000 K high-temperature gas environment. In addition, the prepared prototype DHSV-bio-FS survived for 1,200 s in a high-temperature gas environment of 200 kW/m 2 in wind tunnel experiments. This paper verifies the reliability of DHSV-bio-FS in a high-temperature gas environment and can be deployed in applications of flexible skin for deformable high-speed vehicles (DHSV-FS).

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Section: Methodsmentioning

confidence: 99%

Thermal Protection Performance of Biomimetic Flexible Skin for Deformable High-Speed Vehicles (DHSV-bio-FS) under Uniaxial Tensile Strain

Yuan,

Lü,

Bao

2024

Research

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“…Greuel et al [12] experimentally proved that when the blowing rate is less than 0.7%, the transpiration cooling efficiency increases linearly with the increase of coolant. Qian [13] used solid hydrogel as coolant and Wu [14] combined sublimation and transpiration cooling, to improve the cooling effect for porous plates. Foreest [15] and Wang et al [16,17] respectively observed and analyzed the ice formation on a nose cone under supersonic condition in the process of transpiration cooling with phase change.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Mechanism of Transpiration Cooling for Porous Struts Based on Local Thermal Non-Equilibrium Model

Yang

Bian

et al. 2022

Energies

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Struts as an important structure in the combustion chamber of hypersonic flight vehicles to inject fuel into main flow face a severe thermal environment. Transpiration cooling is considered as a potential method to provide a thermal protection for struts. This paper presents a numerical investigation on transpiration cooling for a strut based on Darcy–Forchheimer model and the local thermal non-equilibrium model and analyzes the mechanism of transpiration cooling. A coolant film and a velocity boundary layer are formed on the strut surface and the shock wave is pushed away from the strut, which can effectively reduce the heat load exerted on the strut. The temperature difference between coolant and solid matrix inside the porous strut is analyzed, a phenomenon is found that the fluid temperature is higher than solid temperature at the leading edge inside the porous strut. As flowing in the porous medium, the coolant absorbs heat from solid matrix, and the fluid temperature is higher than solid temperature at the stagnation point of the strut. The influence of coolant mass flow rate and various coolants on transpiration cooling is studied. As mass flow rate increases, the cooling efficiency becomes higher and the temperature difference between fluid and solid in the porous medium is smaller. The coolant with a lower density and a higher specific heat will form a thicker film on the strut surface and absorbs more heat from solid matrix, which brings a better cooling effect for strut.

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Numerical investigation on the performances of porous matrix with transpiration and film cooling

Ding

Wang

et al. 2019

Applied Thermal Engineering

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An experimental investigation on combined sublimation and transpiration cooling for sintered porous plates

Cited by 24 publications

References 23 publications

Thermal Protection Performance of Biomimetic Flexible Skin for Deformable High-Speed Vehicles (DHSV-bio-FS) under Uniaxial Tensile Strain

Thermal Protection Performance of Biomimetic Flexible Skin for Deformable High-Speed Vehicles (DHSV-bio-FS) under Uniaxial Tensile Strain

Numerical Investigation on the Mechanism of Transpiration Cooling for Porous Struts Based on Local Thermal Non-Equilibrium Model

Numerical investigation on the performances of porous matrix with transpiration and film cooling

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