At ambient temperature and pressure

the ignition performance of the internally-staged combustor under different ignition energy and ignition frequency combinations was experimentally investigated. The ignition energy values ranged from 1J to 15J

the ignition frequency values ranged from 1Hz to 15Hz

and air pressure drop remained at 1.5%. The experimental results indicated that

as the ignition energy increased

the excess air coefficient of lean ignition increased rapidly at first and then increased slowly

while the ignition delay time was shortened sharply and then slowly. As the ignition frequency increased

the excess air coefficient of lean ignition increased slowly

and the ignition delay time was shortened rapidly and then slowly

this regularity was more pronounced at lower ignition energy. When the ignition power was greater than 35 W

increasing the ignition power had little significance to improve the ignition performance

and the ignition energy had more significant effect on ignition performance than ignition frequency; under the same ignition power

it was better to raise the ignition energy to improve the ignition performance. A model of ignition based on Lefebvres and WANG Yanshengs ignition models was obtained by combustor reference velocity

Sauter mean diameter

ignition energy and ignition frequency

and the prediction error of the model was controlled within ±10%.