Numerical simulations of flame propagation and DDT in obstructed detonation tubes filled with fluidic obstacles

Yongjia Wang, Wei Fan, Shuxin Li, Qibin Zhang, Hongbin Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

In order to investigate the impact of hot fluidic obstacles on the flame acceleration and deflagration-to-detonation transition (DDT) process, 2D numerical simulations were conducted in 6 mm channels, using ethylene and air as fuel and oxidizer, respectively. Computations show that the DDT time can be reduced by 37.5% with hot fluidic obstacles, compared to that of the smooth tube. The flame in the detonation chamber can be accelerated either by turbulence occurred around the jet hole, or by the retonation wave ejected from the jet cavity which attributes to the shock-flame interaction. Compared to the typical physical obstacles, the fluidic obstacles can decrease the total pressure loss significantly, which indicates its potential to be applied in the propulsion system.

Original languageEnglish
Title of host publication21st AIAA International Space Planes and Hypersonics Technologies Conference, Hypersonics 2017
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624104633
DOIs
StatePublished - 2017
Event21st AIAA International Space Planes and Hypersonics Technologies Conference, Hypersonics 2017 - Xiamen, China
Duration: 6 Mar 20179 Mar 2017

Publication series

Name21st AIAA International Space Planes and Hypersonics Technologies Conference, Hypersonics 2017

Conference

Conference21st AIAA International Space Planes and Hypersonics Technologies Conference, Hypersonics 2017
Country/TerritoryChina
CityXiamen
Period6/03/179/03/17

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