| 摘要: |
| 为了获得固体燃料超燃冲压发动机燃烧室初始型面和研究不同台阶高度下的初始型面的变化规律,将固体燃料燃面退移速率模型耦合到准一维流动方程中,发展了一种计算固体燃料超燃冲压发动机燃烧室性能的准一维数值计算方法。利用该方法,将燃空比和流场马赫数作为燃烧室性能的优化参数,得出了不同台阶高度下满足优化目标的燃烧室型面。根据所得的优化型面,归纳了型面参数随着台阶高度的变化规律。结果表明,随着台阶高度的增大,燃烧室的整体长度增大,等直段的长度增大,扩张段的扩张比减小,扩张段的长度减小。 |
| 关键词: 固体燃料 超燃冲压发动机 燃烧室 台阶 初始型面 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金(51276020)。 |
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| Initial Profile Variation Rule of Solid Fuel Scramjet Combustor with Different Step Height |
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WANG Li-he, WU Zhi-wen, CHI Hong-wei, WEI Zhi-jun, WANG Ning-fei
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(School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China)
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| Abstract: |
| In order to obtain the initial profile of the solid fuel scramjet combustor and find out its variation rule with different step height, a solid fuel regression rate model was coupled to the quasi-one dimensional flow equations.Then a quasi-one dimensional numerical method for combustor pafermance was established. With this method, combustors with different height were investigated by putting the fuel/air ratio and flow Mach number as the performance optimization criteria. Those combustors show that, as the step height increasing, the total length of the combustor and the length of the straight combustor increase,while the expansion ratio and the length of expansion combustor decrease. |
| Key words: Solid fuel Scramjet Combustor Step Initial surface |
