Ignition and relighting in supersonic flows is an important challenge for the design of hypersonic propulsion systems. Supersonic compressible interest exhibit much larger local variations velocity, shear, thermodynamic state than their incompressible counterparts. Thus, it to study relationship between ignition kernel evolution, initial spark location, kernel’s subsequent flow history. We leve...

It is well known that buoyancy has a major influence on the flow structure of turbulent nonpremixed jet flames. For example, previous studies have shown that transitional and turbulent jet flames exhibit flame lengths that are as much as a factor of two longer in microgravity than in normal gravity. The objective of this study is to extend these previous studies by investigating both mean and f...

The study of interactions of jet into cross flow at different longitudinal and transverse angles of jet was studied. The following components were designed and constructed: a low velocity wind tunnel to produce the uniform flow, a flat plate with a traverse injection system to simulate the jet injection, and a spatial rake to measure the total pressure. The tests were carried out at longitudina...

the study of interactions of jet into cross flow at different longitudinal and transverse angles ofjet was studied. the following components were designed and constructed: a low velocity windtunnel to produce the uniform flow, a flat plate with a traverse injection system to simulate the jetinjection, and a spatial rake to measure the total pressure. the tests were carried out atlongitudinal (α...

Large-eddy simulations (LES) combined with the partially stirred reactor (PaSR) combustion model are employed to investigate turbulent mixing, mode, and flame stability of a sonic hydrogen jet injecting into high-enthalpy supersonic crossflow at three momentum flux ratios J, in other words, 0.71, 2.11, 4.00, respectively. The LES accuracy terms kinetic energy, power spectra density, subgrid Dam...

Atomization of liquid fuel controls combustion efficiency and pollutant emissions of internal combustion engines and gas turbines (Lefebvre 1998). The liquid jet in crossflow (LJCF) finds application in lean premixed prevaporized (LPP) ducts, afterburners for gas turbines, and combustors for ramjets and scramjets. This flow configuration, which consists of a turbulent liquid jet injected transv...

Understanding of flame anchoring in a jet crossflow (JICF) configuration is vital to the design fuel injectors combustion devices. The present study numerically investigates hydrogen-rich injecting perpendicularly into hot vitiated using direct numerical simulation (DNS). governing equations low-Mach-number multicomponent reactive flows are solved, with chemical mechanism for hydrogen-air flame...