用堵塞比研究逆流脉冲爆轰燃烧室爆轰特性

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-05-19 DOI:10.1016/j.csite.2025.106366

Yudong Yang , Longxi Zheng , Dingding Wang , Changxin Peng , Jie Lu

{"title":"用堵塞比研究逆流脉冲爆轰燃烧室爆轰特性","authors":"Yudong Yang , Longxi Zheng , Dingding Wang , Changxin Peng , Jie Lu","doi":"10.1016/j.csite.2025.106366","DOIUrl":null,"url":null,"abstract":"<div><div>The reverse-flow pulse detonation combustor (PDC) exhibits a shorter axial length in contrast to the straight-tube PDC, thereby enhancing its suitability for engineering applications. In order to investigate the influence of the blockage ratio of the mixing section on the detonation characteristics of the reverse-flow PDC, a combined approach of numerical calculation and experiment was adopted. The detonation characteristics of the PDC under different blockage ratio schemes were comparatively analyzed. The results show that elevating the blockage ratio can effectively reduce the size of the reverse-flow zone, eliminate the oil entrainment phenomenon. The deflagration to detonation (DDT) distance generally first increases and then decreases as the blockage ratio rises. In contrast to the baseline scenario, for the PDC structure with a blockage ratio of 0.65, the lean flameout limit has a minimum reduction of 35 % (at 5 Hz) and a maximum reduction of 59 % (at 25 Hz). The rich flameout limit has a minimum reduction of 2 % (at 5 Hz) and a maximum reduction of 39 % (at 20 Hz). The stable working range is enhanced by a minimum of 1.12 times (at 10 Hz) and a maximum of 2.55 times (at 15 Hz).</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"72 ","pages":"Article 106366"},"PeriodicalIF":6.4000,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Investigation on the detonation characteristics of reverse-flow pulse detonation combustors via blockage ratio\",\"authors\":\"Yudong Yang , Longxi Zheng , Dingding Wang , Changxin Peng , Jie Lu\",\"doi\":\"10.1016/j.csite.2025.106366\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The reverse-flow pulse detonation combustor (PDC) exhibits a shorter axial length in contrast to the straight-tube PDC, thereby enhancing its suitability for engineering applications. In order to investigate the influence of the blockage ratio of the mixing section on the detonation characteristics of the reverse-flow PDC, a combined approach of numerical calculation and experiment was adopted. The detonation characteristics of the PDC under different blockage ratio schemes were comparatively analyzed. The results show that elevating the blockage ratio can effectively reduce the size of the reverse-flow zone, eliminate the oil entrainment phenomenon. The deflagration to detonation (DDT) distance generally first increases and then decreases as the blockage ratio rises. In contrast to the baseline scenario, for the PDC structure with a blockage ratio of 0.65, the lean flameout limit has a minimum reduction of 35 % (at 5 Hz) and a maximum reduction of 59 % (at 25 Hz). The rich flameout limit has a minimum reduction of 2 % (at 5 Hz) and a maximum reduction of 39 % (at 20 Hz). The stable working range is enhanced by a minimum of 1.12 times (at 10 Hz) and a maximum of 2.55 times (at 15 Hz).</div></div>\",\"PeriodicalId\":9658,\"journal\":{\"name\":\"Case Studies in Thermal Engineering\",\"volume\":\"72 \",\"pages\":\"Article 106366\"},\"PeriodicalIF\":6.4000,\"publicationDate\":\"2025-05-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Case Studies in Thermal Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2214157X25006264\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"THERMODYNAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Case Studies in Thermal Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214157X25006264","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"THERMODYNAMICS","Score":null,"Total":0}

引用次数: 0

摘要

与直管式脉冲爆震燃烧室相比，逆流式脉冲爆震燃烧室具有更短的轴向长度，从而提高了其工程应用的适用性。为了研究混合段堵塞比对逆流PDC爆震特性的影响，采用数值计算与实验相结合的方法。对比分析了不同堵塞比方案下PDC的爆震特性。结果表明，提高堵塞比可有效减小逆流区尺寸，消除吸油现象。一般情况下，随着堵塞比的增大，爆燃爆轰距离先增大后减小。与基准方案相比，对于堵塞比为0.65的PDC结构，贫熄火极限最小降低35% (5hz)，最大降低59% （25hz）。丰富的熄火限制最小减少2%（在5赫兹）和最大减少39%（在20赫兹）。稳定工作范围在10hz时最小提高1.12倍，在15hz时最大提高2.55倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Investigation on the detonation characteristics of reverse-flow pulse detonation combustors via blockage ratio

The reverse-flow pulse detonation combustor (PDC) exhibits a shorter axial length in contrast to the straight-tube PDC, thereby enhancing its suitability for engineering applications. In order to investigate the influence of the blockage ratio of the mixing section on the detonation characteristics of the reverse-flow PDC, a combined approach of numerical calculation and experiment was adopted. The detonation characteristics of the PDC under different blockage ratio schemes were comparatively analyzed. The results show that elevating the blockage ratio can effectively reduce the size of the reverse-flow zone, eliminate the oil entrainment phenomenon. The deflagration to detonation (DDT) distance generally first increases and then decreases as the blockage ratio rises. In contrast to the baseline scenario, for the PDC structure with a blockage ratio of 0.65, the lean flameout limit has a minimum reduction of 35 % (at 5 Hz) and a maximum reduction of 59 % (at 25 Hz). The rich flameout limit has a minimum reduction of 2 % (at 5 Hz) and a maximum reduction of 39 % (at 20 Hz). The stable working range is enhanced by a minimum of 1.12 times (at 10 Hz) and a maximum of 2.55 times (at 15 Hz).

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.