The Research on Plume Flow Field and Infrared Radiation Characteristic of Pulse Detonation Engine

As a new concept propulsion system, pulse detonation engines (PDE) show many advantages compared to other conventional propulsion system. In the future, pulse detonation engines will be expected to become the propulsion system of hypersonic flight vehicle. However, exhaust plume is the infrared radiation source of detection, tracking and recognition. Two-dimensional axisymmetric and unsteady Navier-Stokes equations were numerically solved and detailed chemical reaction kinetics of hydrogen/air mixture was used. With the fields of pressure, temperature and main components of the exhaust plume as input data, the line-by-line method and LOS method was used to calculate the infrared spectral radiation properties of the plume. The plume flow field structure and infrared radiation characteristics are analyzed in detail. The effect of the different nozzle structure on plume radiation was analyzed.