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    • Design of a Nanosecond Pulsed Plasma Power Supply and Ammonia Ignition Experiment
    DOI：10.13949/j.cnki.nrjgc.2025.03.006
    Key Words:ammonia  nanosecond pulse discharge  power mechanical engineering  plasma
    Author NameAffiliationE-mail
    RONG Weixin* School of Energy and Power Engineering， Shandong University， Jinan 250061， China wxrong@mail.sdu.edu.cn 
    HU Yong School of Energy and Power Engineering， Shandong University， Jinan 250061， China huyg@mail.sdu.edu.cn 
    YU Wenbin School of Energy and Power Engineering， Shandong University， Jinan 250061， China wbyu@sdu.edu.cn 
    ZHAO Feiyang* School of Energy and Power Engineering， Shandong University， Jinan 250061， China fyzhao@sdu.edu.cn 
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    Abstract:To address the challenges of narrow ignition limits and slow laminar flame propagation speed in ammonia combustion， a high-voltage nanosecond pulsed plasma power supply was developed to achieve sustained discharge and ammonia ignition under high-pressure conditions. A dielectric barrier discharge（DBD） spark plug directly applicable to engine cylinders was designed and fabricated herein. Experimental results show that the power supply successfully achieves ammonia ignition in a 0.7 MPa environment. Comparative studies with conventional spark plugs reveal that the DBD spark plug significantly reduces ignition delay time and peak pressure arrival time， while achieving a higher peak combustion pressure. At an initial pressure of 0.7 MPa and an equivalence ratio of 0.9， the time to reach peak combustion pressure is shortened by 19.7%， and the peak combustion pressure is increased by 12.18%.
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