Subsonic Jet Flow Field and Sound Field Characteristics Influenced by No--le Inlet Air Temperature

ZHANG Yi; TU Shan; HONG Zhenhan; ZHENG Weicheng; LI Zhongshu

doi:10.7652/xjtuxb202002022

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Subsonic Jet Flow Field and Sound Field Characteristics Influenced by No--le Inlet Air Temperature

更新时间：2025-05-08

- Subsonic Jet Flow Field and Sound Field Characteristics Influenced by No--le Inlet Air Temperature
- Vol. 54, Issue 2, Pages: 175-181(2020)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202002022
  CLC： V211
- Online First：10 February 2020，
  
  Published：2020
- 稿件说明：
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ZHANG Yi, TU Shan, HONG Zhenhan, et al. Subsonic Jet Flow Field and Sound Field Characteristics Influenced by No--le Inlet Air Temperature[J]. 2020, 54(2): 175-181.
DOI：

ZHANG Yi, TU Shan, HONG Zhenhan, et al. Subsonic Jet Flow Field and Sound Field Characteristics Influenced by No--le Inlet Air Temperature[J]. 2020, 54(2): 175-181. DOI： 10.7652/xjtuxb202002022.

摘要

为了研究亚声速喷管入口气温对射流流场及声场的影响

建立了亚声速喷管计算模型

在与实验及模拟数据对比验证的基础上

分别计算了不同喷管入口气温作用下的喷管外流场和远场噪声

探究了喷管入口气温改变时喷管出口射流速度沿轴向及径向的分布规律以及喷管出口轴线上射流温度的变化特性

同时也分析了喷管入口气温对射流流场发展和远场噪声的影响。研究结果表明:射流温度增加会较为显著地缩短势流核心区域长度

势流核心区域宽度会有少许降低; 射流轴线上的静温和总温在喷管后一定距离存在一个温度上升过程

各工况静温最高处比总温最高处有延后

且射流温度越高

温度开始上升位置越接近喷管出口; 温度的升高对不同频率噪声影响有很大差别

降低工质入口温度有利于降噪。该研究内容为进一步探究射流噪声形成机制打下基础

同时也可为喷流噪声的控制提供新的思路。

Abstract

To explore the influence of subsonic no--le inlet air temperature on jet flow field and sound field

a subsonic no--le calculation model was established. Compared with experimental and simulative data

the flow field and far-field noise radiation were evaluated at different no--le inlet air temperatures. The distribution laws of jet velocity at the outlet of the no--le along the axial and radial directions

as well as the variation of jet temperature along the no--le exit axis

were investigated. The influences of no--le inlet air temperature on jet flow field development and far-field noise were analy-ed. The results show that the increasing temperature of jet significantly shortens the length of the core region of the potential flow

and slightly reduces the width of the core region of the potential flow. The static temperature and the overall temperature at the jet axis with a certain distance from the no--le rise. The highest static temperature under each working condition is delay

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references

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