Effects of Characteristic Structure on Combustion Characteristic of Composite Paraffin-Based Grain

被引：0

作者：

Zhang Z.-L. ^{[1
,2
]}

Lin X. ^{[2
]}

Wang R.-Y. ^{[2
,3
]}

Luo J.-X. ^{[2
,3
]}

Wang Z.-Z. ^{[2
]}

Zhang C.-Y. ^{[1
]}

Li F. ^{[2
]}

Yu X.-L. ^{[2
,3
]}

机构：

[1] School of Aerospace Engineering, North University of China, Taiyuan

[2] State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing

[3] School of Engineering Science, University of Chinese Academy of Sciences, Beijing

来源：

Tuijin Jishu/Journal of Propulsion Technology | 2023年 / 44卷 / 07期

关键词：

Characteristic structure; Combustion char⁃ acteristic; Composite grains; Hybrid rocket motor; Scale;

D O I：

10.13675/j.cnki.tjjs.2211059

中图分类号：

学科分类号：

摘要：

The characteristic structure consisting of grooves is an important factor in improving the combus⁃ tion performance of the composite paraffin-based grain compared to the conventional paraffin-based grain，which results from the different regression rates of the helical substrate and the paraffin-based fuel. The effect regulation of pre-characteristic structure with 0mm and 2mm scales（the depth of grooves）was investigated，including the combustion chamber pressure，regression rate，and characteristic velocity. The firing tests used gas oxygen as oxi⁃ dizer with average flow rates of 11.6，18.5，and 23.1g/s，respectively，and the conventional round-hole paraffin-based grain was selected as a baseline test. The tests result show that the 2mm scale pre-set characteristic struc⁃ ture composite grains take the shortest time from ignition to pressure stabilization and have the highest regression rate and characteristic velocity at the same oxidizer mass flow rate. Computational fluid dynamics（CFD）was used to analyze the effect regulation of characteristic structure with different scales on gas flow characteristics. The cold flow results show that the larger scale of the characteristic structure guides the swirl flow field with high⁃ er intensity，and influences a wider region. © 2023 Journal of Propulsion Technology. All rights reserved.

引用

共 24 条

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