Topology optimization design of regenerative cooling channels around the inserted pylon in hypersonic engine

被引:1
作者
Jing, Tingting [1 ]
Zhang, Ting [1 ,2 ]
Sun, Xing [1 ]
Zhang, Guangxi [3 ]
Qin, Fei [1 ]
He, Guoqiang [1 ]
机构
[1] Northwestern Polytech Univ, Natl Key Lab Solid Rocket Prop, 127 West Youyi Rd, Xian 710072, Shaanxi, Peoples R China
[2] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Yuk Choi Rd 11, Hong Kong, Peoples R China
[3] Northwestern Polytech Univ, 127 West Youyi Rd, Xian 710072, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Topology optimization; Regenerative cooling; Inserted pylon; Hypersonic vehicle; Supercritical-pressure heat transfer; SUPERCRITICAL HYDROCARBON FUEL; TURBULENT HEAT-TRANSFER; N-DECANE; THERMAL PROTECTION; NUMERICAL-ANALYSIS; SINK UTILIZATION; FLOW-RATE; SCRAMJET; CAVITY; DETERIORATION;
D O I
10.1016/j.applthermaleng.2024.125282
中图分类号
O414.1 [热力学];
学科分类号
摘要
The regenerative cooling technique is widely used in the active thermal protection systems for air-breathing hypersonic engines due to its high energy utilization efficiency. However, the design of regenerative channels is complicated by the presence of several components inserted through the combustor wall of hypersonic engine like pylons. With the conventional method, the bypassing cooling channel would cause large pressure loss and nonuniform flow distribution. In this paper, an innovative topology optimization method is proposed to design the cooling channels bypassing the inserted pylon. The optimization results show that with the constraint of low power dissipation, the coolant tends to flow out through the unaffected area and the isolated outlet is easy to occur under the boundary condition of multiple flow inlets and outlets. The isolated outlet would lead to significant nonuniformity of flow distribution and local overheating. To avoid these phenomena, the fluid area fraction and power dissipation constraints should be increased. Subsequently, the topology- optimized bypassing cooling channel structure is simulated numerically, and the results show that, compared to the conventional design of bypassing cooling channel, the optimized channel's pressure drop, maximum temperature and temperature distribution uniformity are improved by 23.2%, 10.4% and 3.5%, respectively, and the flow stagnation is avoided.
引用
收藏
页数:19
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