The Numerical Simulation Of The Cold Flow Properties In The Advanced Vortex Combustor

Energy is an indispensable resource in the process of human development. Theenergy scarcity and environmental pollution result in the industry such as shipping,aviation, electric power and etc are committed to the development of newtechnologies and products, so as to improve the fuel utilization, reducing thedischarge of pollutants.As an important part of the engine, combustor is the direct place for fuelcombustion. Its working efficiency, will directly affect the efficiency of the engineperformance and fuel utilization. Therefore, the development of efficient cleancombustion technology is a major problem to be solved in the field of engine. Now，though a considerable progress is made in the gas turbine combustion technology inour country, there is still a gap with the developed countries in the aspect ofcombustion theory, the acquisition and cognition of the key technology. A numericalstudy on the internal flow characteristics about a advanced vortex combustor in coldstate were conducted in this paper.First, to analyze the effects of different arrangements about jet orifice on theadvanced vortex combustor, we established different jet model and then made thenumerical simulation. After analyze the change of the total pressure recovery and flowfield structure of the combustor under the effect of different jet model, eventuallydetermine the jets simultaneously placed on the front wall of the first cavity surfaceand the combustor wall is most conducive jet scheme.Secondly, a new blunt body is placed at the back of the second blunt body to forma dual-cavity structure combustor based on the prototype. Then the simulation in thecondition of different blunt-body geometry and the inlet velocity is conducted. Theresults show that the geometrical dimension change of the new added blunt body andthe flow velocity changes all significantly influence the internal flow characteristicsof the combustor. And S2/S1=1.0, H3/H2=1.0,30m/s are respectively the optimalspacing, height and flow velocity.Finally, retrofit the double cavity structure by perforation, then analyze theinterior combustor flow characteristics changes before and after the modification andthe impact of size of the hole to the flow characteristics of the combustor. The results state that the flow field characteristics changed a lot before and after combustormodification, and D2=20mm, D3=4mm are respectively the best modification schemeon the second and third blunt body.