Comparative Assessment of the Combustion Property of a Cavity-Based Scramjet Combustor with Strut and Wall Injection Technique

2021 ◽  
pp. 189-200
Author(s):  
Ravi Kumar Samadhiya ◽  
Devendra Singh
Keyword(s):  
Comparative Assessment ◽  
Injection Technique ◽  
Scramjet Combustor ◽  
Combustion Property ◽  
Wall Injection

Numerical investigation on implication of innovative hydrogen strut injector on performance and combustion characteristics in a scramjet combustor

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sribhashyam Krishna Kireeti ◽  
Gadepalli Ravikiran Sastry ◽  
Santosh Kumar Gugulothu
Keyword(s):  
Transport Model ◽  
Weight Ratio ◽  
Combustion Efficiency ◽  
Navier Stokes ◽  
Mixing Efficiency ◽  
Injection Technique ◽  
Mixing Rate ◽  
Navier Stokes Equation ◽  
Ansys Fluent ◽  
Scramjet Combustor

Abstract A detailed numerical analysis on a scramjet combustor is carried out by introducing an innovative shaped strut in place of the conventional strut. The design of newly added strut aids in generating intense vorticity which helps in efficient mixing of fuel and oxidizer. The air from the isolator enters the combustor at Mach 2.0, whereas fuel enters from the trailing edge of the strut sonically. In this study the flow dynamics with finite volume approach on commercial software Ansys-Fluent 20.0 to solve the two-dimensional Reynolds average Navier Stokes equation (RANS) with compressible fluid flow by considering the density-based solver with SST k-ε turbulent model. The species transport model with volumetric reaction and finite rate/eddy dissipation turbulence chemistry interaction is adopted to study the combustion phenomena and validated with the experimental results, and it is found that the interaction of the shear shock layer enhances the mixing rate by intensifying turbulence. The modified strut injector’s mixing efficiency is compared to the base strut and observed that with a 40% reduction in length, the modified strut injection technique exhibited a mixing efficiency of >95%. The combustion efficiency is then estimated streamwise, and the plot follows the same pattern as the mixing efficiency with fuel burns down completely when x = 150 mm for the modified strut whereas x = 200 mm for the base strut. This can compact the combustion chamber and increases the thrust-to-weight ratio. So, the innovative strut adopted can improvise the combustion efficiency.

Computational Analysis of Mixing in Scramjet Combustor using Cross Flow Injection Technique

2019 ◽  
Vol 11 (2) ◽  
Author(s):  
D. Hasen ◽  
R. Karthikeyan ◽  
M. Sundararaj ◽  
K. M. Parammasivam
Keyword(s):  
Flow Injection ◽  
Computational Study ◽  
Cross Flow ◽  
Injection Pressure ◽  
Supersonic Combustion ◽  
Injection Technique ◽  
Fuel Injectors ◽  
Flow Recirculation ◽  
Scramjet Combustor ◽  
Number Variation

The prime issue in supersonic combustion is proper mixing within short duration of time. Computational study has been performed to analyse the mixing of air and fuel using cross flow injection technique. Cross flow injection is performed by placing the fuel injectors on the walls of the scramjet engine which is perpendicular to the flow. To enhance the mixing of fuel and air, cavities were introduced. The flow recirculation inside the cavity will enhance the mixing and combustion. The fuel injectors were placed just upstream of the cavity. Analyses were done by changing the injection angles. The air is allowed to enter at different Mach numbers and the changes were analysed using ANSYS software. The roles of cavity cross flow injection, pressure, temperature, velocity and Mach number variation were examined in this study and the obtained results were compared between various configurations.

Effect of wall cavity with combined fuel injection technique in scramjet combustor with CFD

2021 ◽  
Author(s):  
Kumari Ambe Verma ◽  
Krishna Murari Pandey ◽  
Kaushal Kumar Sharma
Keyword(s):  
Fuel Injection ◽  
Injection Technique ◽  
Scramjet Combustor

Studies of the Portal Venous System by Injection Technique

1951 ◽  
Vol 17 (2) ◽  
pp. 209-223 ◽  
Author(s):  
R.O. Holmes ◽  
W.V. Lovitt
Keyword(s):  
Venous System ◽  
Injection Technique ◽  
Portal Venous System
Sign in / Sign up

Export Citation Format

Share Document