Author
Wenhu Han
Other affiliations: Chinese Academy of Sciences, Tsinghua University
Bio: Wenhu Han is an academic researcher from Beijing Institute of Technology. The author has contributed to research in topics: Detonation & Shock wave. The author has an hindex of 9, co-authored 26 publications receiving 275 citations. Previous affiliations of Wenhu Han include Chinese Academy of Sciences & Tsinghua University.
Papers
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TL;DR: In this paper, the integrated processes of flame acceleration, deflagration-to-detonation transition (DDT), and the resulting detonation propagation in micro- and macro-scale channels are simulated.
92 citations
TL;DR: In this article, the authors developed a three-dimensional parallel solver using the fifth order high-resolution weighted essentially non-oscillatory (WENO) finite difference scheme to perform extensive simulation for 3D gaseous detonations.
67 citations
TL;DR: In this article, the structure and propagation of the 1D detonation for the H2 O2 system with argon dilution are calculated by solving the Euler and diffusive NS equations.
28 citations
TL;DR: In this paper, the authors developed a parallel code, adopting a fifth-order weighted essentially nonoscillatory (WENO) scheme with a third-order TVD Runge-Kutta time stepping method for the two-dimensional reactive Euler equations, to investigate the propagation process of methane explosion in bend ducts.
25 citations
TL;DR: The role of a transversal concentration gradient in detonation propagation in a two-dimensional channel filled with an bump and thus the unreacted pocket behind the front, while the transverse wave causes mixing and burning of the residue fuel downstream is discussed in this paper.
Abstract: The role of a transversal concentration gradient in detonation propagation in a two-dimensional channel filled with an bump and thus the unreacted pocket behind the front, while the transverse wave causes mixing and burning of the residue fuel downstream. Nevertheless, for the steepened concentration gradient, a transverse detonation is present and consumes the fuel in the compressed and preheated zone by the leading shock; consequently, the detonation velocity deficit is not increased significantly for detonation with the single-head propagation mode close to the limit.
23 citations
Cited by
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TL;DR: An overview of the research done worldwide to address some of the challenges and questions pertaining to the physics of rotating detonation combustors operation is provided in this paper, where notable parallels are drawn to the phenomena of low and high frequency instabilities in solid and liquid rockets that have been recognized as the most severe hindrance to their operation.
204 citations
TL;DR: A brief survey of two selected classes of high order methods, namely the weighted essentially non-oscillatory (WENO) finite difference and finite volume schemes and discontinuous Galerkin (DG) finite element methods, emphasizing several of their recent developments.
160 citations
TL;DR: In this article, the effect of diffraction, shock reflection and detonation instability on the propagation of detonation is examined, and the analysis of critical length scale between the cell size and BR when the detonation fails or succeeds as it passes the obstacles is also performed.
122 citations
TL;DR: In this article, the velocity of the combustion wave in five mixtures (i.e., C2H4-6N2O, CH4-2O2, 2H2-O2 and CH4.5O2) is measured to analyze velocity behavior near the limits, and the stability parameter χ is computed from CHEMKIN package and chemical kinetics.
99 citations
TL;DR: The basic ideas behind ENO and WENO schemes are surveyed, their properties are discussed, and examples of their applications to different types of PDEs as well as to non-PDE problems are presented.
Abstract: Essentially non-oscillatory (ENO) and weighted ENO (WENO) schemes were designed for solving hyperbolic and convection–diffusion equations with possibly discontinuous solutions or solutions with sharp gradient regions. The main idea of ENO and WENO schemes is actually an approximation procedure, aimed at achieving arbitrarily high-order accuracy in smooth regions and resolving shocks or other discontinuities sharply and in an essentially non-oscillatory fashion. Both finite volume and finite difference schemes have been designed using the ENO or WENO procedure, and these schemes are very popular in applications, most noticeably in computational fluid dynamics but also in other areas of computational physics and engineering. Since the main idea of the ENO and WENO schemes is an approximation procedure not directly related to partial differential equations (PDEs), ENO and WENO schemes also have non-PDE applications. In this paper we will survey the basic ideas behind ENO and WENO schemes, discuss their properties, and present examples of their applications to different types of PDEs as well as to non-PDE problems.
77 citations