Pulse Detonation Igniter for Ramjet Application

Hertzel Kadosh
Merhav Prize | The work is towards a PhD degree under the supervision of Dr. Dan Michaels
Department of Aerospace Engineering
Technion – Israel Institute of Technology

Pulse detonation rocket engine burns the fuel and oxidizer using detonation waves. The engine is consist of a tube closed at one end and open at the other. Fuel and oxidizer are injected near the head end, and the mixture is ignited. Following a deflagration to detonation process, the detonation travels towards the open end of the tube, leaving behind a high pressure and high temperature gas that generates thrust as it expands and expels out. In this study, we investigate the use of a pulse detonation engine as an ignition system for ramjet or scramjet engines using liquid hydrocarbon fuels, which are known for their challenging conditions for ignition and combustion. Unlike conventional deflagration-based gas generators, in detonation engines, the combustion products are expelled behind a very strong shock wave, which has significant benefits for ignition. It increases the temperature and pressure of the fuel-air mixture and enhances mixing with the igniter’s combustion products. However, although a study on pulse detonation devices started at the 60th, a pulse detonation igniter is a new application with limited published information and knowledge. The goal of this research is to develop scientific knowledge on the main physical stages of a pulse detonation igniter. The experimental study focuses on characterizing the deflagration to detonation transition (DDT) of different liquid fuels with oxygen, for different DDT enhancement techniques and the interaction of the detonation wave with a fuel spray. Understanding these phenomena will enable the design and integration of a pulse detonation igniter. The initial results presented here focus on characterizing DDT and detonation velocity in mixtures of liquid ethanol and oxygen.

The talk will be given in English

Wed, 08-06-2022, 13:30-14:30 (Gathering at 13:30)

Classroom 165, ground floor, Library, Aerospace Eng. & https://technion.zoom.us/j/95399288483?pwd=Z3NxdHhHTGJRYms1MGQ2SnJMRUpvQT09

Light refreshments will be served after the lecture at the lounge

Pulse Detonation Igniter for Ramjet Application