Numerical Simulation on Critical Initiation Conditions of Air-Breathing Pulse Detonation Combustor

Tianyu Sun, Yujia Yang, Wei Fan

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

Abstract

In order to conduct accurate numerical simulations of the pulse detonation combustor using fewer computational resources, a three-step ethylene/air global reaction mechanism was established. Using this mechanism, the ignition delay times and detonation initiations can be accurately predicted. So as to reproduce the results of the detailed mechanism, the activation energy of the three-step mechanism is set as a key parameter that varies with the initial state of the reactants. A database of detonation simulation activation energy was established in a board range of equivalence ratio of 0.7-2.3, temperature, and pressure in front of the shock wave of 300 K and 0.2-2 atm. The developed mechanism was used to successfully predict the lean and rich limits of detonation initiation for simulation in an air-breathing pulse detonation combustor, as well as the initiation distances were obtained. The simulation results were consistent with the theoretical limits estimated by cell sizes. This indicates that the established three-step mechanism is appropriate for the simulations of detonation initiation.

Original languageEnglish
Title of host publication2022 13th International Conference on Mechanical and Aerospace Engineering, ICMAE 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages227-232
Number of pages6
ISBN (Electronic)9781665472357
DOIs
StatePublished - 2022
Event13th International Conference on Mechanical and Aerospace Engineering, ICMAE 2022 - Bratislava, Slovakia
Duration: 20 Jul 202222 Jul 2022

Publication series

Name2022 13th International Conference on Mechanical and Aerospace Engineering, ICMAE 2022

Conference

Conference13th International Conference on Mechanical and Aerospace Engineering, ICMAE 2022
Country/TerritorySlovakia
CityBratislava
Period20/07/2222/07/22

Keywords

  • detonation initiation
  • detonation simulations
  • ethylene/air
  • ignition delay
  • pulse detonation combustor

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