Numerical Study on the Internal Flow Field of Air-breathing PDE with Central Cone-scales Valve

Yanbin HU

National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China

Abstract: The paper derives the unstructured triangular grid CE/SE method to describe the changing process of internal flow field for an air-breathing Pulse Detonation Engine(PDE) with central cone-scales valve(CCSV) in detail. The paper also presents a numerical study on the valve. The research results indicate that the calculated rising edge of detonation wave in an air-breathing PDE with CCSV is steep, while the change laws of its peak pressure and pressure curve are in agreement with the experimental results, which proves that the unstructured triangular grid CE/SE method with ｓｏｕｒｃｅ terms can be successfully applied to the calculation of internal flow field of air-breathing PDE with CCSV. Meanwhile, the change rule of pressure flow field in pipe is obtained through the analysis of pressure contour, which agrees with the experimental process.

Keywords: Air-breathing Pulse Detonation Engine(PDE); Central Cone-scales Valve(CCSV); CE/SE Method; Internal Flow Field; Deflagration to Detonation Transition(DDT)