Scholarlink

<p>The computational analysis of detonation combustion in pulse detonation combustor with shrouded ejector has been simulated for alkene and alkane fuel–air mixture. The numerical simulations are carried out to minimize the thermal NO<sub>x</sub> at several pulse times for aforesaid fuel–air mixture. The stoichiometric (<i>ϕ</i> = 1) mixture of ethylene (C<sub>2</sub>H<sub>4</sub>) and octane (C<sub>8</sub>H<sub>18</sub>) fuel are used for detonation combustion wave propagation simulation. The chemical species of aforesaid two hydrocarbon fuel are solved by species transport equation. The eddy-dissipation combustion model and single-step Arrhenius chemical kinetics model are used to simulate the flow physics of reacting fuel–air mixture in Ansys fluent platform. From the simulation, fully developed detonation wave is found at shortest possible time of 0.021&#xa0;s for both the cases. However, from the contours plot analysis the vortex core generation is found more for octane (C<sub>8</sub>H<sub>18</sub>)-air mixture combustion compared to ethylene (C<sub>2</sub>H<sub>4</sub>)-air combustion. The pickup flame propagation speed of 1981&#xa0;m&#xa0;s<sup>−1</sup> is obtained from ethylene (C<sub>2</sub>H<sub>4</sub>)-air mixture and this magnitude is higher than Chapman Jouguet (C–J) velocity. The pollutant number generation magnitude of 0.0162 is found from ethylene–air combustion, which is less compared to octane-air combustion. The abrupt change of combustor pressure is more for ethylene–air mixture combustion. So far, maximum propulsive thrust with significant magnitude of 37.82&#xa0;N is obtained at pulse time of 0.021&#xa0;s and this magnitude is stronger than octane-air detonation combustion.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Numerical studies on detonation combustion of alkene and alkane fuel–air mixture in pulse detonation combustor with shrouded ejector

  • 期刊论文

  • 发表日期：

    2025年7月28日

查看全文
  • Pinku Debnath,
  • Krishna Murari Pandey

摘要

The computational analysis of detonation combustion in pulse detonation combustor with shrouded ejector has been simulated for alkene and alkane fuel–air mixture. The numerical simulations are carried out to minimize the thermal NOx at several pulse times for aforesaid fuel–air mixture. The stoichiometric (ϕ = 1) mixture of ethylene (C2H4) and octane (C8H18) fuel are used for detonation combustion wave propagation simulation. The chemical species of aforesaid two hydrocarbon fuel are solved by species transport equation. The eddy-dissipation combustion model and single-step Arrhenius chemical kinetics model are used to simulate the flow physics of reacting fuel–air mixture in Ansys fluent platform. From the simulation, fully developed detonation wave is found at shortest possible time of 0.021 s for both the cases. However, from the contours plot analysis the vortex core generation is found more for octane (C8H18)-air mixture combustion compared to ethylene (C2H4)-air combustion. The pickup flame propagation speed of 1981 m s−1 is obtained from ethylene (C2H4)-air mixture and this magnitude is higher than Chapman Jouguet (C–J) velocity. The pollutant number generation magnitude of 0.0162 is found from ethylene–air combustion, which is less compared to octane-air combustion. The abrupt change of combustor pressure is more for ethylene–air mixture combustion. So far, maximum propulsive thrust with significant magnitude of 37.82 N is obtained at pulse time of 0.021 s and this magnitude is stronger than octane-air detonation combustion.