Prediction of Precombustion Wall Pressure Distributions in Scramjet Engines

Computational Simulation of Scramjet Combustors - A Comparison between Quasi-One Dimensional and 2-D Numerical Simulations

“…The location and structure of the shock wave can affect the flow properties entering the combustor and therefore are crucial parameters for the design of scramjet fueling schemes [18]. Waltrup and Billig developed a correlation for the length of the shock trains (given below as equation 1) [19]. The boundary layer momentum thickness, flow Mach number before the leading edge of the shock train and back pressure are identified as the most dominant parameters governing the length of the shock trains [18].…”

Three-dimensional effects in modeling of dual-mode scramjets

“…Previous work in the area of dual-mode analysis and predictive capability includes the early work of Billig 1 , Billig et al 2 , and Waltrup and Billig 3,4 . They developed correlations based on one-dimensional and two-dimensional flow analysis which included such drivers as incoming boundary-layer thickness and maximum combustor pressure rise.…”

Comparison of a Direct-Connect and Freejet Dual-Mode Scramjet

“…It is interesting to note the excellent agreement in shock train length and yet the consistent difference in the pressure ratio. The relationship between the two has been well studied, and the empirical formula put forth by Waltrup and Billig is often cited [24]. …”