高超声速低温喷管副喷管参数化设计
Parameterized design for HYLTE secondary nozzle
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摘要: 通过对DF化学激光器高超声速低温(HYLTE)喷管副喷管流动与几何参数进行制约关系和敏感性分析，确定了能够对副喷管进行参数化设计的4个基本几何控制参数和2个调节参数，初步建立了HYLTE喷管副喷管的参数化设计方法。引入了相对未混合度作为衡量喷管混合效果的性能参数，建立了较完备的3维反应流数值模拟计算程序。结果表明：该方法选择的基本参数能够敏感地反映HYLTE喷管副喷管的尺寸特征和关键性能。Abstract: A parameterized design method for secondary nozzle of hypersonic low temperature(HYLTE) nozzle of DF chemical laser was established in order to provide an available approach to optimize HYLTE nozzle. Four basic geometric parameters and two adjusting parameters were selected for the parameterized nozzle design by analyzing the restriction and sensitivity of those parameters which affect the nozzle performance or configuration. The relative unmixedness was introduced to evaluate the mixing performance of the designed nozzle. Furthermore, a 3 dimensional simulation code was built to compute the flowfield of the nozzle and cavity. It is indicated that the primary performance for nozzle evaluating is sensitive to the basic geometric parameters.
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Key words:
- chemical laser /
- hylte nozzle /
- secondary nozzle /
- parameterized design
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