Visualization of Vaporized Kerosene Combustion in a Supersonic Combustor Using Pulsed Schlieren System

Abstract

A pulsed schlieren system using a nanosecond-flashlamp has been developed to study the flow-field of supersonic combustion. A high speed camera was used to capture the instantaneous flow structures. The camera and the flash-lamp source were synchronized using a pulse generator.Due to the extremely high luminous density of the spark, the background illumination has been suppressed effectively with an exposure time of order of microsecond. The instantaneous schlieren images of injection and combustion of pilot hydrogen and vaporized kerosene in a Ma 2.5 combustor have been captured and analyzed.

Study on Flame Stabilization in a Dual-Mode Combustor Using Optical Measurements

“…To learn more details about reactive flowfield, a pulsed schlieren system was improved by the authors' group [29]. The schematic diagram of the optical measurement system is shown in Fig.…”

Characteristic Scales in Supersonic Combustion

“…Figure 11 also shows the Cocks's 22 datas (delta in white) from a large eddy simulation post-processing of the SCHOLAR scramjet test case using Hydrogen/air laminar and 1-step chemistry, which can be seen to be in excellent agreement with the present work. [17][18] of the supersonic combustion due to low costs, convenient storage and so on.…”

Combustion of Vaporized Kerosene in Supersonic Model Combustors with Dislocated Dual Cavities

“…A previous experiment [23] shows that the penetration depth of vaporized kerosene in a supersonic combustor can be as large as 40 mm. It is reasonable to expect that the injection from one side of the combustor wall cannot consume the oxygen near the other side if the height of the combustor is larger than the penetration depth.…”