Unsteady Simulation of Ignition of Turbulent Reactive Swirling Flow of Novel Design of Solid-Fuel Ramjet Motor

Abstract

This paper presents a numerical investigation of ignition and combustion stabilization of a novel design of a solid-fuel ramjet (SFRJ) motor with and without swirl flow. The proposed design includes two solid fuels, retaining the simple design of the classic SFRJ. Numerical simulations of unsteady, turbulent, reactive, and swirling flow coupled with solid-fuel pyrolysis have been performed using an in-house CFD solver. Experiments on SFRJ were conducted via a connected-pipe test facility to validate the developed code. Furthermore, the code was validated for chemical reactions, heat diffusion, and swirl flow by using benchmark test cases of shock-induced, semi-infinite plate, and dump combustor with swirl flow, respectively. Then, the proposed and classic designs were simulated for the same inflow conditions and configurations, and the results were analyzed and discussed. It is found that the mixing degree, reactant residence time, mass flux, ignition delay time, and regression rate improve when using the proposed design. Moreover, the proposed design reveals interesting observations of a new flame being created and merged with the main flame.

Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

“…This paper analyses and models the electromagnetic environment around a spacecraft through four aspects, the spatial characteristics, time-domain characteristics, frequency-domain characteristics and energy-domain characteristics, to superiorly evaluate the influence and threat of electromagnetic radiation on electronic equipment in spacecraft. Each electronic device in a spacecraft can be regarded as an electromagnetic sensor, and the electromagnetic interference on every electromagnetic sensor is affected by many parameters, such as the operating time, induction direction, working frequency, working bandwidth, separation distance and frequency offset [23]. As shown in Figure 4 3).…”

Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

“…This paper analyses and models the electromagnetic environment around a spacecraft through four aspects, the spatial characteristics, time-domain characteristics, frequencydomain characteristics and energy-domain characteristics, to superiorly evaluate the influence and threat of electromagnetic radiation on electronic equipment in spacecraft. Each electronic device in a spacecraft can be regarded as an electromagnetic sensor, and the electromagnetic interference on every electromagnetic sensor is affected by many parameters, such as the operating time, induction direction, working frequency, working bandwidth, separation distance and frequency offset 23 . As shown in Figure 4(A), these parameters have different effects on the electromagnetic compatibility of the electronic equipment; additionally, the exterior parameters have priority over the interior parameters when calculating electromagnetic interference.…”