电子测量与仪器学报

马馨玥,谢代梁,徐志鹏,徐雅,刘铁军,曹松晓.不同结构微小音速喷嘴的数值模拟与特性对比[J].电子测量与仪器学报,2020,34(9):188-196

不同结构微小音速喷嘴的数值模拟与特性对比

Numerical simulation and characteristic comparison of micro-sonic nozzles in different structures

DOI：

英文关键词:sonic nozzle simulation geometry structure discharge coefficient

基金项目:

作者	单位
马馨玥	1.中国计量大学浙江省流量计量技术重点实验室
谢代梁	1.中国计量大学浙江省流量计量技术重点实验室
徐志鹏	1.中国计量大学浙江省流量计量技术重点实验室
徐雅	1.中国计量大学浙江省流量计量技术重点实验室
刘铁军	1.中国计量大学浙江省流量计量技术重点实验室
曹松晓	1.中国计量大学浙江省流量计量技术重点实验室

Author	Institution
Ma Xinyue	1.Key Laboratory of Flow Measurement Technology of Zhejiang Province, China Jiliang University
Xie Dailiang	1.Key Laboratory of Flow Measurement Technology of Zhejiang Province, China Jiliang University
Xu Zhipeng	1.Key Laboratory of Flow Measurement Technology of Zhejiang Province, China Jiliang University
Xu Ya	1.Key Laboratory of Flow Measurement Technology of Zhejiang Province, China Jiliang University
Liu Tiejun	1.Key Laboratory of Flow Measurement Technology of Zhejiang Province, China Jiliang University
Cao Songxiao	1.Key Laboratory of Flow Measurement Technology of Zhejiang Province, China Jiliang University

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中文摘要:

为了降低加工水平对微小音速喷嘴性能的限制,提出了收缩喷嘴、扩散喷嘴和圆锥形文丘里喷嘴 3 种非标准音速喷嘴结构,并分析形状结构对 3 种喷嘴流动特性的影响。选取喷嘴喉径为 0. 03~ 0. 12 mm,分别对其内部流场进行数值仿真,并分析收缩段、喉部和扩散段的几何结构对喷嘴流动特性的影响,最后对比了喷嘴的流动特性。研究发现,扩散喷嘴的流出系数和临界背压比较优,且该类喷嘴加工难度最小。此外,喉径和喉部长度对喷嘴流动特性的影响最大,喉径越大,喉部长度越小,喷嘴流动特性越好。这为后续微小喷嘴的研制提供一定的借鉴。

英文摘要:

In order to reduce the limitation of the processing level on the performance of micro-sonic nozzles, three non-standard sonic nozzle structures including the shrink nozzle, the diffusion nozzle, and the conical Venturi nozzle are proposed. It was also analyzed respectively that how the geometry and shape of the nozzle affects flow characteristics. Numerical simulation was used to analyze the internal flow field of the nozzle whose diameter is selected from 0. 03mm to 0. 12mm. Not only the influence of the geometry of the constricted section, the throat and the diffusing section on the nozzle flow characteristics were analyzed, but also the flow characteristics of them were compared. It is found that the discharge coefficient and critical back pressure of the diffusion nozzle are superior, and the processing difficulty of this type of nozzle is the smallest. In addition, throat diameter and throat length have the greatest influence on nozzle flow characteristics. In addition, it is found that the throat diameter and the throat length have the greatest influence on the nozzle flow characteristics. The larger the throat diameter and the smaller the throat length, the larger the nozzle discharge coefficient and the critical back pressure ratio. These studies provide some reference for the development of subsequent micro-nozzles.

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