Hypersonic flow past radiation-cooled surfaces

Hirschel, Ernst Heinrich; Kog, A.; Riedelbauch, S.

doi:10.2514/6.1991-5031

Cited by 5 publications

(1 citation statement)

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“…Meanwhile, as the propulsion system of hypersonic aircraft, the scramjet also suffers from heavy heat load. The maximum temperature in combustion chamber is close to 4000K when the flight Mach number is 8 (Song et al, 2006), which is too large that even the most advanced material used in aircraft cannot bear (Hirschel et al, 1991). Hence, the design of thermal protection system becomes a key issue in scramjet (Jin et al, 2016;Zhang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

The influence of working pressure on the heat transfer process and heat absorption of supercritical CO2 in thermoelectric conversion system

Yang¹,

Wang²,

Niu³

et al. 2022

Proceedings of Global Power &Amp; Propulsion Society

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The influence of working pressure, which is one of the most important parameters in the design of thermoelectric conversion system, on the heat transfer process and heat absorption of supercritical CO2 in the square heated duct is numerically studied. Under the calculated cases, two main vortices with opposite flow direction are formed at the inlet of the heated section. Accordingly, due to the effect of two main vortices, the local heat transfer coefficient profiles on bottom and up wall are M shaped. Meanwhile, it is founded that one wall temperature peak is presented near the inlet of heated duct. With the increase of working pressure, the wall temperature peak decreases gradually. For the safety of the system, it is better to choose 15 MPa as the working pressure due to the relatively low wall temperature peak and pressure. To evaluate the heat absorbed by working fluid, the one-dimensional steady heat transfer model is built. It is found that the absorbed heat changes non-monotonically and the maximum, namely 1080.11 W, is reached under 10 MPa. From the point of heat absorption, it is better to choose 10 MPa as working pressure.

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Section: Introductionmentioning

confidence: 99%