Experimental study of flame characteristics of ethylene and its mixture with methane and hydrogen in supersonic combustor

Application of static integrated skeletal reduction and tabulation of dynamic adaptive chemistry in the combustion simulation of ethylene-fueled scramjet combustor

“…Mechanism extraction and clean-up is rst carried out to extract sub-mechanism of species with carbon number #4 (including H 2 mechanism) and clean unnecessary sub-mechanisms of NO x and NH 3 . According to the operating conditions of the ethylenefueled scramjet combustor, 3,5,10,11,22,73 the temperature range of 900-1800 K, pressure range of 1-4 atm, and equivalence ratio range of 0.25-5.0 are chosen as the reduction conditions. The cost-effective r-DRGEP with FS method 44 and the efficient but slightly expensive improved SA method 53 are employed to perform the two stage species eliminations, followed by the reactions elimination based on the method of CSP importance index.…”

“…Ethylene (C 2 H 4 ) has the advantages of easy storage, short ignition delay time, and great energy per unit volume, which is also an important intermediate during oxidation and pyrolysis process of large hydrocarbons. [1][2][3][4][5] Thus, it serves as fuel or surrogate fuel in practical scramjet combustors. 3,[6][7][8][9][10][11] Ethylene kinetic mechanism with high accuracy is one of the key elements for combustion simulation of ethylene-fueled scramjet combustors to reveal their combustion and ow phenomena.…”

Flow structure of pressure transmission tube and its influence on unsteady pressure measuring results in compressible flow

“…scramjet) are usually harsher because of the drastic airflow lash, aerodynamic heating and combustion heat release. Though high-temperature piezoelectric [33], piezoresistive [34][35][36] and fiber optic [37] sensors at 600-1000 • C have been developed, flush-mount sensors are not robust and affordable enough in the turbojet [38] and scramjet combustor [39,40] with a 1300-2000 • C static temperature. Therefore, water cooled pressure sensors with tubes [41,42] and pressure probes [38,43] are still used in high enthalpy airflow.…”

Inlet air and fuel flow pressure fluctuation effect on supersonic combustion

“…Zhu et al (2018) experimentally studied the flashback phenomenon in the scramjets and showed that it may occur in some equivalence ratios. Zhong et al (2019) analyzed experimentally the flame characteristics of different fuels in the supersonic combustor and found that their ignition process is similar, but the frequency of the flame oscillations depends on the fuel type. Li and Qiao (2019) studied the effect of inlet conditions on the ignition and flame stabilization of the supersonic combustion chamber and showed that the air throttling may help to achieve the flame stabilization.…”