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Recirculation Characteristics by the Inlet Angle and Dome Size of a Liquid Ramjet Combustor using PIV Method  

Kim, Gyu-Nam (경북대학교 기계공학부 대학원)
Lee, Choong-Won (경북대학교 기계공학부)
Sohn, Chang-Hyun (경북대학교 기계공학부)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.11, no.1, 2007 , pp. 51-56 More about this Journal
Abstract
Flow characteristics in a liquid fuel ramjet combustor were investigated using the PIV method. The combustor has two rectangular inlets that form a $90^{\circ}$ angle each other. Three cases of test combustors are made in which those inlet angles are $30^{\circ},\;45^{\circ}\;and\;60^{\circ}$. The experiments were performed in a water tunnel test with the same Reynolds number as Mach 0.3 at the inlet. PIV software was developed to measure the characteristics of the flow field in the combustor. A large and complex recirculating flow was measured in the dome area with 4 different dome size. Experimental results shows that 1/3 dome size of combustor diameter is suitable and smaller inlet angle provide large recirculation flow at the dome of combustor as a frame holder in this experimental ranges but need to consider secondary recirculation flow in a junction region to optimize the configuration of ramjet combustor.
Keywords
Ramjet; PIV; Combustor; Dome size; Inlet angle;
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