Experimental and theoretical investigating on measurement of dynamic response characteristics of the semi-infinite pressure tube with non-uniform temperature

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-02-18 DOI:10.1016/j.apacoust.2025.110589

Longchao Xu , Yunpeng Liu , Ronghui Cheng , Yingwen Yan

{"title":"Experimental and theoretical investigating on measurement of dynamic response characteristics of the semi-infinite pressure tube with non-uniform temperature","authors":"Longchao Xu , Yunpeng Liu , Ronghui Cheng , Yingwen Yan","doi":"10.1016/j.apacoust.2025.110589","DOIUrl":null,"url":null,"abstract":"<div><div>In combustion instability experiments, oscillatory pressure is commonly sampled using a semi-infinite pressure tube, but the non-uniform temperature distribution adds complexity to the correction of oscillatory pressure. This paper innovatively investigates the impact of non-uniform temperature distribution on the dynamic response characteristics of semi-infinite pressure tubes using a one-dimensional discrete method for sound propagation, obtaining the distribution of sound pressure gain and phase difference in the pressure tube. The results indicate that the end of the semi-infinite pressure tube can be approximated as a non-reflective boundary; however, the presence of sensor mounts on the sidewalls of the pressure tube creates small cavity structures that reflect sound waves, leading to non-monotonic characteristics in the dynamic response of the pressure tube. An increase in pressure tube root temperature reduces the traveling wave specific acoustic impedance, amplifying the pressure tube gain. At a pressure tube root temperature of 500 °C, the temperature non-uniformity effect overall amplifies the gain by about 1.2 times. By establishing a one-dimensional sound wave propagation theory analysis, combined with acoustic simulation and experimental verification, this paper reveals the mechanism of action of non-uniform temperature fields on the dynamic response within pressure tube, providing theoretical guidance for correcting oscillatory pressure measurements in combustion instability of gas turbines and aero-engines.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"233 ","pages":"Article 110589"},"PeriodicalIF":3.4000,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Acoustics","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0003682X25000611","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ACOUSTICS","Score":null,"Total":0}

引用次数: 0

Abstract

In combustion instability experiments, oscillatory pressure is commonly sampled using a semi-infinite pressure tube, but the non-uniform temperature distribution adds complexity to the correction of oscillatory pressure. This paper innovatively investigates the impact of non-uniform temperature distribution on the dynamic response characteristics of semi-infinite pressure tubes using a one-dimensional discrete method for sound propagation, obtaining the distribution of sound pressure gain and phase difference in the pressure tube. The results indicate that the end of the semi-infinite pressure tube can be approximated as a non-reflective boundary; however, the presence of sensor mounts on the sidewalls of the pressure tube creates small cavity structures that reflect sound waves, leading to non-monotonic characteristics in the dynamic response of the pressure tube. An increase in pressure tube root temperature reduces the traveling wave specific acoustic impedance, amplifying the pressure tube gain. At a pressure tube root temperature of 500 °C, the temperature non-uniformity effect overall amplifies the gain by about 1.2 times. By establishing a one-dimensional sound wave propagation theory analysis, combined with acoustic simulation and experimental verification, this paper reveals the mechanism of action of non-uniform temperature fields on the dynamic response within pressure tube, providing theoretical guidance for correcting oscillatory pressure measurements in combustion instability of gas turbines and aero-engines.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.