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对于驻点层流和与平板平行的层流中的富烃燃料类燃烧产物在燃烧室壁上的积碳进行了数值分析研究。采用求解耦合动量、能量和积碳传输方程的方法求出积碳的预计值。这些方程包括了积碳损耗的各种传输特性和热迁移传输(即沿温度梯度的质量转移)的影响。液体火箭发动机采用燃气发生器工作循环时燃烧室内壁上的瞬时积碳沉积率由于积碳层的热阻而明显减小。
The carbon deposition on the wall of the combustor was studied numerically for stagnant laminar and parallel flow laminar flow of LPG-rich fuel combustion products. The estimated carbon deposition was obtained by solving the coupled momentum, energy and carbon deposition equations. These equations include the effects of various transport characteristics of coke loss and the transport of heat transfer (ie mass transfer along the temperature gradient). The instantaneous deposition rate of carbon deposit on the inner wall of the combustion chamber when the liquid propellant rocket engine adopts the gas generator working cycle is obviously reduced due to the thermal resistance of the carbon deposit layer.