Development of scaling law for radiative heat transfer from high enthelpyshock layrs

研究了钝体周围非平衡、高焓激波层的辐射传热。在马赫数为25 ~ 35时，辐射换热主要由激波后紧接产生的热化学不平衡层的强辐射发射引起。随着上游马赫数的增加，辐射发射强度急剧增加，导致辐射换热急剧增加。在上述条件下，强发射层的厚度几乎与鼻部半径无关。因此，在如此低的马赫数水平下，辐射换热几乎与半径不变。在较高的马赫数水平上，靠近壁面的高电子密度区域的辐射发射成为主导。在这种情况下，辐射传热随物体尺寸的增加而增加。

Radiative heat transfer from non-equilibrium, high-enthalpy shock layrs generated around a blunt body has been studied. At Mach numbers from 25 to 35, the radiative heat transfer is mainly caused by strong radiative emission in a thermally and chemically non-equilibrium layr generated immediately behind the shock wave. According as an upstream Mach number increase, the intensity of the radiative emission sharply increases, resulting in sharp increase in the radiativeheat transfer. Under the above-mentioned condition, the thickness of the strong emission layr is almost independent of the nose radius. Hence, the radiative heat transfer is almost unchanged with the radius at such a low Mach number levels. At higher Mach number levels, radiative emission from a high-electron-density region near the wall become dominant. In this case, the radiative heat transfer increases with the dimensions of the body.