Injection and Mixing Processes in High-Pressure Liquid Oxygen/Gaseous Hydrogen Rocket Combustors

Mayer, W.; Schik, A.; Schäffler, M.; Tamura, Hiroshi

doi:10.2514/2.5647

Cited by 138 publications

(42 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other data are available in the previous literature (see Candel et al, 1998;Herding et al, 1995Herding et al, , 1996Herding et al, , 1998Juniper et al, 2000Juniper et al, , 2001aJuniper et al, , 2001bKendrick et al, 1998Kendrick et al, , 1999Snyder et al, 1997;Tripathi, 2001) Another set of results are described in Mayer et al ( , 1998Mayer et al ( , 2000Mayer et al ( , 2001, and Mayer and Tamura (1996), but these studies pertain to a different range of injection conditions. Only imaging data are considered in what follows but there are some quantitative measurements of temperature and species (see e.g., Pal et al, 1996;Yeralan et al, 2001).…”

Section: Introductionmentioning

confidence: 76%

Structure and Dynamics of Cryogenic Flames at Supercritical Pressure

Candel

Juniper

Singla

et al. 2006

Combustion Science and Technology

129

View full text Add to dashboard Cite

A detailed understanding of liquid propellant combustion is necessary for the development of improved and more reliable propulsion systems. This article describes experimental investigations aimed at providing such a fundamental basis for design and engineering of combustion components. It reports recent applications of imaging techniques to cryogenic combustion at high pressure. The flame structure is investigated in the transcritical range where the pressure exceeds the critical pressure of oxygen ðp > p c ðO 2 ¼ 5:04 MPaÞÞ but the temperature of the injected liquid oxygen is below its critical value ðT O2 < T c ðO 2 Þ ¼ 154 KÞ. Data obtained from imaging of OH Ã radicals emission, CH Ã radicals emission in the case of LOx=GCH 4 flames and backlighting provide a detailed view of the flame structure for a set of injection conditions. The data may be used to guide numerical modelling of transcritical flames and the theoretical and numerical analysis of the stabilization process. Calculations of the flame edge are used to illustrate this aspect. Results obtained may also be employed to devise engineering modelling tools and We wish to thank CNES, Snecma and CNRS for their continuous support of our work in rocket propulsion. The assistance of the ''Mascotte'' team of Onera under the leadership of Lucien Vingert and Mohamed Habiballah is gratefully acknowledged.

show abstract

Section: Introductionmentioning

confidence: 76%

Structure and Dynamics of Cryogenic Flames at Supercritical Pressure

Candel

Juniper

Singla

et al. 2006

Combustion Science and Technology

129

View full text Add to dashboard Cite

show abstract

“…Shear-coaxial injection processes in liquidrocket engines exhibit two distinct modes of combustion [1][2][3][4][5]. At subcritical pressures, the liquid jets atomize.…”

Section: Phenomenological Trendsmentioning

confidence: 99%

Thermophysical characteristics of shear-coaxial LOX–H2 flames at supercritical pressure

Oefelein

2005

Proceedings of the Combustion Institute

145

View full text Add to dashboard Cite

“…As the temperature reached the critical point, finer spray with smaller droplets was observed. Mayer et al 5 investigated the single and coaxial jet from subcritical to supercritical conditions and found that beyond the critical pressure, the interface of the jet exhibited streaky like appearance; because of vanishing capillary force in supercritical region, a change in the atomization mechanism was observed. Several notable investigations are made by Chehroudi et al 6 to understand the physical mechanism as well as the characteristic feature of the supercritical jet.…”

Section: Introductionmentioning

confidence: 98%

Experimental study of elliptical jet from supercritical to subcritical conditions using planar laser induced fluorescence

Muthukumaran

Vaidyanathan

2015

Physics of Fluids

View full text Add to dashboard Cite

The study of fluid jet dynamics at supercritical conditions involves strong coupling between fluid dynamic and thermodynamic phenomena. Beyond the critical point, the liquid-vapor coexistence ceases to exist, and the fluid exists as a single phase known as supercritical fluid with its properties that are entirely different from liquids and gases. At the critical point, the liquids do not possess surface tension and latent heat of evaporation. Around the critical point, the fluid undergoes large changes in density and possesses thermodynamic anomaly like enhancement in thermal conductivity and specific heat. In the present work, the transition of the supercritical and near-critical elliptical jet into subcritical as well as supercritical environment is investigated experimentally with nitrogen and helium as the surrounding environment. Under atmospheric condition, a liquid jet injected from the elliptical orifice exhibits axis switching phenomena. As the injection temperature increases, the axis switching length also increases. Beyond the critical temperature, the axis switching is not observed. The investigation also revealed that pressure plays a major role in determining the thermodynamic transition of the elliptical jet only for the case of supercritical jet injected into subcritical chamber conditions. At larger pressures, the supercritical jet undergoes disintegration and formation of droplets in the subcritical environment is observed. However, for supercritical jet injection into supercritical environment, the gas-gas like mixing behavior is observed.

show abstract

Injection and Mixing Processes in High-Pressure Liquid Oxygen/Gaseous Hydrogen Rocket Combustors

Cited by 138 publications

References 5 publications

Structure and Dynamics of Cryogenic Flames at Supercritical Pressure

Structure and Dynamics of Cryogenic Flames at Supercritical Pressure

Thermophysical characteristics of shear-coaxial LOX–H2 flames at supercritical pressure

Experimental study of elliptical jet from supercritical to subcritical conditions using planar laser induced fluorescence

Contact Info

Product

Resources

About