A parametric study of staged fuel injector configurations for scramjet applications

Weidner, E. H.; Drummond, J. P.

doi:10.2514/6.1981-1468

Cited by 11 publications

(12 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to analyse the parametric effects on the mixing process in supersonic flows, the experimental model, as investigated by Weidner and Drummond [16], is employed to provide data for evaluation of the numerical method since this data have a good 2D structure.…”

Section: Physical Model and Numerical Methodsmentioning

confidence: 99%

Parametric effects in a scramjet engine on the interaction between the air stream and the injection

Huang

Pourkashanian

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

The mixing of fuel and air in supersonic flow plays a significant role in the enhancement of the performance of scramjet engines. In this article, the two-dimensional coupled implicit Reynolds-averaged Navier–Stokes equations and the standard k–ε turbulent model are introduced to investigate the interaction between the supersonic air flow and the helium stream injected into a typical scramjet engine. A range of different angles (30–150°) of both the incoming air stream and the helium injection under various pressure conditions (0.62–1.86 MPa) have been investigated to assess their impact on the mixing. It is shown among the cases studied for different helium injections that an angle of 90° produces the highest mixing efficiency. In the cases with a variable air stream angle, then the situation with a 30° air stream angle can achieve a higher mixing efficiency than other angles. In addition, with a higher pressure of the injection, the air stream and the helium mix better.

show abstract

Section: Physical Model and Numerical Methodsmentioning

confidence: 99%

Parametric effects in a scramjet engine on the interaction between the air stream and the injection

Huang

Pourkashanian

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

show abstract

“…To verify the present code, a comparison has been made with the experimental data published by Weidner et al (6) . The geometry of the experiment is shown in the inset on Fig.…”

Section: Program Verificationmentioning

confidence: 96%

“…Similar conclusion for a mixing flow field was also drawn by Thayer III et al (5) . Weidner et al (6) conducted a parametric study using staged, perpendicular fuel injectors. They studied the mixing of hydrogen by varying the distance between injectors and the fuel split (percentage of fuel injected per injector).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A numerical study on the mixing of air and hydrogen in a scramjet combustor

Ali

Fujiwara

2005

Aeronaut. j.

View full text Add to dashboard Cite

A numerical study on mixing of air and hydrogen is performed by solving two-dimensional full Navier-Stokes equations. The main stream is air of Mach 5 entering through the configured inlet of the combustor and gaseous hydrogen is injected from the configured jet on the side wall. Supersonic mixing and diffusion mechanisms of a transverse hydrogen jet in two-dimensional finite air streams have been analyzed and discussed. The computed results are compared with the experimental data and show good agreement. For an otherwise fixed combustor geometry, the air inlet width and injection angle are varied to study the physics of mixing and flow field characteristics. On the effect of inlet width variation, two competing phenomena have been observed: (i) upstream of injector the strength of recirculation is higher for wider inlet and consequently the mixing increases, and (ii) downstream, the diffusion of hydrogen decreases with the increase of inlet width and eventually mixing decreases. As a result, in far downstream the mixing efficiency increases up to certain inlet width and then decreases for further increment of inlet width. For the variation of injection angle results show that upstream of injector the mixing is dominated by recirculation and downstream the mixing is dominated by mass concentration of hydrogen. Upstream recirculation is dominant for injecting angle 60° and 90°. Incorporating the various effects, perpendicular injection shows the maximum mixing efficiency and its large upstream recirculation region has a good flame holding capability.

show abstract

“…where y+ _ pw U~ y _ ~w rw Y (10) ,Uw ]1 w For two-dimensional flow, the magnitude of the vorticity is given by…”

Section: I~ij = -~(~I + {T J)mentioning

confidence: 99%

The effect of injection angle on mixing and flame holding in supersonic combustor

2002

View full text Add to dashboard Cite

A numerical study on mixing of hydrogen injected into a supersonic air stream has been performed by solving two-dimensional full Navier-Stokes equations. An explicit Harten-Yee Non-MUSCL Modified-flux-type TVD scheme has been used to solve the system of equations, and a zero-equation algebraic turbulence model to calculate the eddy viscosity coefficient. The main objectives of this study are to increase the mixing efficiency and flame holding capability of a supersonic combustor. The performance of combustor has been investigated by varying the hydrogen injection angle made with the direction of air stream considering anti-clockwise direction as positive. The injector position from left boundary, backward-facing step height and the inlet width of air stream are kept constant. The results show that upstream of injector the mixing is dominated by recirculation and in downstream the mixing is dominated by mass concentration of hydrogen. Upstream recirculation is dominant for injecting angle 60 ° and 90 ° . Incorporating the various effects, perpendicular injection shows the maximum mixing efficiency and its large upstream recirculation region has a good flame holding capability.

show abstract

A parametric study of staged fuel injector configurations for scramjet applications

Cited by 11 publications

References 4 publications

Parametric effects in a scramjet engine on the interaction between the air stream and the injection

Parametric effects in a scramjet engine on the interaction between the air stream and the injection

A numerical study on the mixing of air and hydrogen in a scramjet combustor

The effect of injection angle on mixing and flame holding in supersonic combustor

Contact Info

Product

Resources

About