Pyoroflare Igniton Technology Research Of Micro Combustor On Cartridge Starting Condition

The micro-turbine has advantages of a light weight,high power,high power density and so on, it hasbroad application prospects in both the military and civilian, the quick start technology is a keytechnology in the application of micro-turbojet engine, cartridge strating is an effective means to solve theengine fast start. As the heart of the the micro-turbine, whether can the micro combustor fast,reliably startis directly related to a quick start performance of the engine. The pyoroflare ignition technology iscommonly used in micro-combustor ignirion which is under cartridge starting condition,because it hasfeatures of high ignition energy, fast ignition and a wide range of work,as for this we take some relatedresearch work.In this paper,firstly we come up with the performance of the pyoroflare ignitor and theprogram of the pyoroflare igniter diversion in allusion to the maximum outside diameter of120mmevaporation pipe micro combustor which is under the cartridge strat;And then using numerical methods tostudy the performance of the coupling pyoroflare igniter micro combustor,finally explore the feasibility ofusing the chemical reactor network method to compute the performance of micro combustor’s pyoroflareigniter.In terms of numerical calculation，The CFD method coupling detailed chemical kinetic mechanism,conducting numerical method to evaporation tube type micro combustor’s pyoroflare igniter. In thecalculation,the calculation method we select are PIOS algorithm,one order upwind scheme,standard k-eturbulence model,standard wall function. And according to the combustion after ignition is whether cancombust stably in order to determine whether the initial conditions can meet the ignition conditions;Thechemical reactor network method, combine with the completely stirred model(PSR), the partially stirredmodel (PASR) and plug-flow reactor model (PFR).The results of this study show that, by rationally layout the position and the size of the jet hole on theingiter diversion pipe,the area near the exit of evaporation pipe which is at the right side forms the idealignition area, the region has a higher temperature(up to about800K) and a better distribution of oil andgas(close to the exactly stoichiometric);3D CFD method and chemical reactor networkmethod(CRN),have some certain predictive ability for the micro combustion’s pyoroflare ignition,canmeet the engineering requirements, CFD method coupling detailed chemical kinetic mechanism,usingsteady-state calulation methods,and in line with whether the combustion temperature after ignition ishigher than the temperature of the ignition jet to determine if the ignition is successful. The chemicalreactor network (CRN) method is to combine completely stirred model (PSR), part stirred model (PASR)and a plug flow reactor model (PFR) simulating combustion ignition condition,using PSR model simulates the head area of flame tube, the partially stirred model (PASR) simulates the middle area andplug-flow reactor model (PFR) simulates the exit.