| Citation: | LI Anqi, LIU Yong, ZHANG Xiang. Optimization method of turbulent flamelet model in afterburner[J]. Journal of Aerospace Power, 2023, 38（5）：1083-1089 doi: 10.13224/j.cnki.jasp.20210303
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In the afterburner with high flow rate high, low pressure, oxygen poverty, the direct fuel injection is predominent, and the combustion model usually overestimates the reaction rate of the afterburner. Table-searching method is used in flamelet models with the advantage of fast calculation, but it is difficult to adjust the reaction rate. Based on the steady laminar flamelet model, unsteady chemical kinetic factors were added to adjust the reaction rate. Based on the experimental data, the key geometric parameters were established. The flamelet database was optimized, and the numerical simulation accuracy of this method was improved under high speed, low pressure, oxygen poverty and poor atomization effect. The results showed that the flamelet database formed by this optimization method can better simulate the complex chemical reaction process in afterburner. According to the calculation results, the simulation error of temperature distribution can be controlled within 15%, and the simulation error of average temperature can be controlled within 5%.
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