Swept plasma jet igniter

Abstract

The invention provides a sweeping type plasma jet flow ignitor. The sweeping type plasma jet flow ignitor comprises a jet flow outlet (101), a jet flow self-excited oscillation cavity (102), an ignitor shell cathode (103), an ignitor anode (104), an ignitor air inlet hole (105), an insulator (106) and a wire connecting hole (107). By the adoption of the sweeping type plasma jet flow ignitor, the defects that the direction of the jet flow generated by a plasma jet flow ignitor is fixed, and the environmental adaptation is poor can be greatly overcome, and the ignition success probability is improved.

Description

technical field [0001] The invention belongs to the design field of aero-engine combustion chambers, and in particular relates to a sweeping plasma jet igniter, which is suitable for reliable ignition in a wide range of aero-engine combustion chambers. Background technique [0002] At present, ignition nozzles are generally used as ignition methods in aero-engine combustion chambers, including semiconductor ignition nozzles, high-energy spark nozzles, etc. Compared with indirect igniters, this type of igniter has the advantages of relatively simple structure and high reliability, but there are some problems as follows: restricted by the discharge efficiency, the ignition system directly uses less energy for ignition, resulting in Insufficient, the size of the fire core is small; especially in high altitude conditions, the defect of insufficient ignition energy is more obvious, which seriously affects the high altitude secondary ignition of the engine, causing serious safety ...

AI Technical Summary

Problems solved by technology

Compared with indirect igniters, this type of igniter has the advantages of relatively simple structure and high reliability, but there are some problems as follows: restricted by the discharge efficiency, the ignition system directly uses less energy for ignition, resulting in Insufficient, the size of the fire core is small; especially in high altitude conditions, the defect of insufficient ignition energy is more obvious, which seriously affects the high altitude secondary ignition of the engine, causing serious safety hazards

[0004] However, at present, the direction of the plasma jet of the plasma jet igniter is fixed. When the installation position of the igniter is fixed, the plasma jet can only be generated in a limited direction, and the environmental adaptability is weak.

However, the structure of the combustion chamber is complex, and the flow field structure is not always in the design state, so that the direction of the plasma jet generated by the igniter is not necessarily the best jet direction for ignition

Images