CFD Analysis of Radical Farming Concept Scramjet Engine

Schloegel, Fabrice; Boyce, Russell

doi:10.2514/6.2009-7416

Cited by 7 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This will be discussed further in Section 4.3. This approach has successfully reconstructed supersonic combustion experiments, see for example [30,41,58]. In these works CFD++ correctly predicted the pressure rise within a scramjet combustor from experiments performed in the T3, T4 and HEG (High Enthalpy Wind Tunnels) shock tunnels at The Australian National University, The University of Queensland and the German Aerospace Centre (DLR), Goettingen respectively.…”

Section: Computational Fluid Dynamics As a Tool For Thermal Compressimentioning

confidence: 99%

“…This work is conducted with future follow on experiments in-mind in The University of Queensland T4 shock tunnel. The engine geometries in [30,41,63,64,72] were successfully tested in this facility, and therefore represent a suitable reference point for this research.…”

Section: Two-dimensional Premixed Studymentioning

confidence: 99%

“…Another example of combustion enhancement from purposely induced flow distortion is the inlet-fuelled radical-farming scramjet [30,38,41]. In the radical-farming scramjet, shown schematically in Figure 3.18, the shock waves generated by the inlet geometry are ingested into the combustor.…”

Section: Fluid Dynamic and Combustion Interactionsmentioning

confidence: 99%

“…The 2-D baseline geometry used in this chapter, shown in Figure 5.1, has a CR of 3.28 with a compression ramp angle of 13 o which is selected based on past studies involving nominally 2-D radical farming scramjets (see [38,41,43,63]). For example the CR used in radical farming studies for 2-D planar compression are 3.0 in [41], 3.37 in [43] and 4.1 in [38].…”

Section: Simulation Set-upmentioning

confidence: 99%

“…The 2-D scramjet used in this chapter is representative of radical farming scramjets which use 2-D planar [30,38,41,43,58,63,72] and axi-symmetric [42,65] inlets coupled with inlet injection. This work is conducted with future follow on experiments in-mind in The University of Queensland T4 shock tunnel.…”

Section: Two-dimensional Premixed Studymentioning

confidence: 99%

See 4 more Smart Citations

Numerical study into thermal-compression scramjets

Bricalli¹

View full text Add to dashboard Cite

This work presents the first high-fidelity numerical study into thermal compression (TC) scramjets. Unlike conventional scramjet engine designs, TC scramjets are designed with an inlet that delivers purposely induced nonuniform-compression to the combustor. This approach was first proposed by Antonio Ferri in the 1960's, who claimed that TC can be used to improve the performance of fixed-geometry scramjets that must operate over a range of flight Mach numbers. The purpose of this work was to develop new knowledge and insight into TC with the use of high-fidelity computational fluid dynamics.In this study, we investigated how combustion in one region of the combustor ignited the flow in other regions of combustor. The study was performed on a generic nonuniformcompression scramjet flow path that was designed by blending a high-compression two-dimensional profile with a 18 o ramp at the centreline with a low-compression two-dimensional profile with a 8 o ramp at the side wall. The high-compression profile produced sufficient compression for combustion, while the low-compression side produced insufficient compression for combustion. The simple geometry allowed the complex propagation of combustion from the high-compression to the low-compression side to be studied in detail. The free stream flow properties corresponded to a Mach 10 flight condition with a dynamic pressure of 100 kPa.The study was conducted with CFD++ using the Reynolds-averaged Navier-Stokes equations. Turbulence was simulated using the SST turbulence model and combustion with the Jachimowski 13 species 33 reaction mechanism. Two numerical approaches were developed to decouple the fluid dynamic/combustion effects: firstly, combustion was disabled in certain regions with the flow field; and secondly, reacting and inert (nonreacting) fuel was injected into the engine at different fuelling sites.Both premixed and inlet-fuelled injection studies were performed on the generic nonuniformcompression engine. The premixed study provided insight into the combustion behaviour independent of any particular fuel injection method. Three flame propagation processes were identified in the study: three-dimensional flow features, emanating from the high-compression side which produced temperatures in the boundary layer that allowed the flow to ignited in the low-compression side of the engine; radical transport through a shock-induced boundary-layer separation, which enhanced combustion in the low-compression side; and TC from combustion in the high-compression side which coupled with the spanwise shock structure. All three flame propagation processes had a significant influence on igniting the flow in the low-compression side of the engine.The premixed work was extended in the inlet-fuelled injection study to evaluate how the added complexity from the flow structures generated from inlet port-hole injection influenced the flame propagation processes. The additional flow structures caused the three-dimensional shock-induced boundary-layer separation to becom...

show abstract

Section: Computational Fluid Dynamics As a Tool For Thermal Compressimentioning

confidence: 99%

Section: Two-dimensional Premixed Studymentioning

confidence: 99%

Section: Fluid Dynamic and Combustion Interactionsmentioning

confidence: 99%

Section: Simulation Set-upmentioning

confidence: 99%

Section: Two-dimensional Premixed Studymentioning

confidence: 99%

See 3 more Smart Citations

2011

17th AIAA International Space Planes and Hypersonic Systems and Technologies Conference

View full text Add to dashboard Cite

CFD Analysis of Radical Farming Concept Scramjet Engine

Cited by 7 publications

References 9 publications

Numerical study into thermal-compression scramjets

Numerical study into thermal-compression scramjets

The flow physics of inlet-fueled, low-compression scramjets

Numerical Simulation of SCRAMSPACE I Flight Experiment

Contact Info

Product

Resources

About