Center for Hypersonic Combined Cycle Flow Physics
Abstract
Combined cycle flow physics were investigated using a team of expert experimentalists and numerical and chemical kinetic modelers. Flowfields were examined in the turbine/ramjet dual inlet mode transition using data from the NASA Glenn IMX facility and RANS calculations. In the ramjet/scramjet mode regime a dual-mode combustion wind tunnel was developed at the University of Virginia for extensive data acquisition using various techniques, including OH PLIF, CARS, TDLAS, TDLAT and SPIV. It was established that the flow operated in the dual-mode at high equivalence ratios due to a pre-combustion shock train, but was supersonic at low equivalence ratios. The NASA HyPulse facility at ATK/GASL was utilized for testing at Mach 7 and 10. RANS models of the dual-mode flowfield produced results that were very well compared to experimental data. FDF models were developed to demonstrate the advantage of particle-based approaches. Chemical kinetic model reduction strategies were developed to reduce the number of specie required. The flame angle from a cavity flame holder was well predicted by classical turbulent flame-speed estimates in a well-premixed cavity-stabilized flowfield, established using a precombustion shock train.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 24, 2015
- Accession Number
- ADA627053
Entities
People
- Andrew D. Cutler
- Christopher P. Goyne
- Harsha K. Chelliah
- Jack R. Edwards Jr.
- James C. Mcdaniel Jr.
Organizations
- University of Virginia