Abstract

The discontinuous Galerkin (DG) method has been popular as a numerical technique for solving the conservation laws of gas dynamics. In the present study, we develop an explicit modal DG scheme for multi-dimensional conservation laws on unstructured triangular meshes in conjunction with non-Newtonian implicit nonlinear coupled constitutive relations (NCCR). Special attention is given to how to t...

VULCAN (Viscous Upwind aLgorithm for Complex flow ANalysis) is a cell centered, finite volume code used to solve high speed flows related to hypersonic vehicles. Two algorithms are presented for expanding the range of applications of the current Navier-Stokes solver implemented in VULCAN. The first addition is a highly implicit approach that uses subiterations to enhance block to block connecti...

Significant advancements in hypersonic airbreathing vehicle technology have been made in the country’s research centers and industry over the past 40 years. Some of that technology is being validated with the X-43 flight tests. This paper presents an overview of hypersonic airbreathing technology status within the US, and a hypersonic technology development plan. This plan builds on the nation’...

Hybrid RANS-LES methods are supposed to provide major contributions future turbulent flow simulations, in particular for reliable predictions under conditions where validation data unavailable. However, existing hybrid suffer from essential problems. A solution these problems is presented as a generalization of previously introduced continuous eddy simulation (CES) methods. These methods, obtai...

Hypersonic high-enthalpy wind tunnels have been a challenge to ground tests in aerospace research area for decades and its test flow uniformity is one of the most important parameters evaluating tunnel performances. Regarding performance requirement, theories methods designing hypersonic nozzles at high enthalpy conditions are quite difficult, but very interesting topics, especially when air mo...

ven with great advances in computational techniques and computing power during recent decades, the modeling of unsteady separated flows, such as those encountered in the wake of a re-entry vehicle, continues to be one of the most challenging problems in CFD. Of most interest to the aerothermodynamics community is accurately predicting transient heating loads on the base of a blunt body, which w...

This paper is devoted to establishing the convergence rate of hypersonic similarity for inviscid steady irrotational Euler flow over a two-dimensional Lipschitz slender wedge in $$BV\cap L^1$$ space. The we established same as one predicted by Newtonian-Busemann law (see (3.29) [2, p 67] more details) incoming Mach number $$\text {M}_{\infty }\rightarrow \infty $$ fixed parameter K. similarity,...