Study of Detonation Interactions Inside a Two-Dimensional Ejector Using Detonation Transmission Tubing

Abstract

The present experimental study employs a non-electrical (NONEL) tube placed inside a twodimensional convergent nozzle with an ejector system. The detonation initiates inside the NONEL tube, due to the reactants deposited on its internal surface, producing a shock wave and consequent products of combustion with repeatable results. High-speed shadowgraphy using the Shimadzu camera was employed to visualise the induced flow field. Pressure measurements were taken at different locations along the test section to study the flow quantitatively. The results revealed that the emergence of the products of combustion from the NONEL tube plays an important role in the flow dynamics within the ejector. The interaction between the combustion products and vortices formed due to shock diffraction lead to the early decay of the vortices. The presence of these vortices are vital in the entrainment of secondary flows through the ejector which is the main reason for the incorporation of ejectors in propulsion applications.