| Plasma ignition technology is a new type of ignition technology, it has a unique ignition characteristics and strong ignition capability. In the plasma ignition process of the actual ignition, the ignition region frequently subject to horizontal flow impact. In order to ensure that the plasma ignition device can be effective and does not damage the plasma ignition, it is necessary to study the ignition process when have lateral to the stream of plasma ignition device. This article uses the method of numerical simulation to study lateral flow how affect the ignition region of plasma ignition device.Combined with the actual structure of the plasma ignition, geometrical model of plasma ignition and ignition area is built through the existing plasma ignition technology research;Using combustion, computational fluid dynamics and other related knowledge,the mathematical and physical model of plasma ignition combustion flow field is established; The standard k～εmodel of turbulent flow, simple and rapid reaction rate model, DO radiation models, etc are utilize in this paper,wall function method is used to process the wall, SIMPLE algorithm is used to solve control equations; used these mathematical physics model, different conditions is simulated.Analyzing the the numerical simulation results of the selected operating mode. Influence principles of the fuel mass flow, air mass flow and thansverse flow velocity to the plasma ignition interior and the ignition area combustion flow-field is gained.In according to the good ignition performance standards of plasma ignition,some results are gained: Plasma ignition has good ignition performance in the condition of fuel mass flow at 0.4g/s and excess air coefficient at 0.4~0.5. Plasma ignition has good ignition performance in the condition of fuel mass flow at 0.5g/s and excess air coefficient at 0.3.When fuel mass flow is 0.6g/s,it is no longer suitable for the ignition because the flame range og ignition are is too large.
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