Characterization of the Primary Ignition Process of a Coaxial GH2/LOX Spray

Large eddy simulation of laser ignition and compressible reacting flow in a rocket-like configuration

“…The numerical study presented in [14] did include out the entire ignition sequence. In [18] the DLR-Tau code was used and results showed how the flame propagated in the whole chamber volume but overpredicted the maximum value of the pressure by 45% compared to experiment.…”

“…Averaged Navier-Stokes (RANS) approach : for example, Schmidt et al [14] and Karl et al [18] carried out simulations of the ignition sequence of the laboratory-scale rocket engine operated at the Lampoldshausen DLR center [19]. The numerical study presented in [14] did include out the entire ignition sequence.…”

“…The M3 burner experiment operated at DLR [19] has been designed to investigate primary ignition processes and combustion in a rocket-like configuration using optical diagnostics [15][16][17]. Propellants may be either cooled by liquid nitrogen for cryogenic tests or injected under ambient conditions.…”

“…Mayer et al [13] studied the atomization of a liquid oxygen jet by a surrounding gaseous hydrogen jet and the effect of ignition on atomization processes. Gurliat et al [16] and Schmidt et al [15] have experimentally studied laser ignition sequences of a gaseous hydrogen and liquid oxygen (GH 2 − Lox) spray in a small scale combustion chamber with a single shear coaxial injector. Smooth and strong ignition processes were analyzed via high speed OH-imaging and Schlieren images.…”

“…Ignition in such configurations is mainly driven by turbulent mixing, convective effects, thermodynamic conditions, interaction between the under-expanded pyrotechnic jet and propellants jets, chemistry and two phase flow effects [1]. Most of these processes have been studied separately but due to measurement difficulties, experimental data on rocket ignition transient is limited [12][13][14][15][16][17]. McManus et al [12] have investigate ignition processes recording the laser-induced fluorescence of the OH radical in a combustion chamber composed of three injectors fed with gaseous hydrogen and air.…”