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Acoustic Field Excitation and Regulation Characteristics of Iso-Octane Combustion Process
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Liming Di1, 2, Qiang Ouyang1, Fuxiang Zhi1, Cheng Shi1
Transactions of CSICE | 2024, 42(1) : 26 - 34
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Transactions of CSICE | 2024, 42(1): 26-34
Acoustic Field Excitation and Regulation Characteristics of Iso-Octane Combustion Process
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Liming Di1, 2, Qiang Ouyang1, Fuxiang Zhi1, Cheng Shi1
Affiliations
  • 1.School of Vehicle and Energy，Yanshan University，Qinhuangdao 066004，China
  • 2.Hebei Key Laboratory of Special Delivery Equipment，Yanshan University，Qinhuangdao 066004，China
doi: 10.16236/j.cnki.nrjxb.202401004
Outline
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The regulation mechanism of ultrasound on iso-octane combustion was analyzed from the macro and micro levels. The three-dimensional computational fluid dynamics model of the original engine was calibrated using the bench test data. Based on the method of physically embedding the dynamic grid sound source surface in the combustion chamber，the ultrasonic with 20kHz frequency and 300μm amplitude was successfully fed into the combustion chamber. Taking the difference between the cylinder pressure with and without ultrasonic wave feeding into the combustion chamber as the ultrasonic radiation pressure disturbance，the effects of ultrasonic field excitation on the ignition delay period，intermediate reaction components and sensitivity analysis of iso-octane were studied. By comparing and analyzing the simulation results of three ultrasonic-fed schemes S1—S3 with no ultrasonic-fed scheme S0，the results show that the S1—S3 schemes can advance the combustion phase，and the peak mole fractions of C3H6，IC4H8 and C2H4 in S2 and S3 are increased by 42.1%，24.7%，27.5% and 21.5%，9.6%，5.3%，respectively and the iso-octane burnout time of both schemes are advanced by 0.18s. When the equivalence ratio is 1 and the initial temperature is 1300K and 1700K，the ignition delay period is shortened by 31.8% and 6.4%，respectively and both promote to produce a large number of OH radicals.

iso-octane  /  combustion characteristics  /  combustion regulation  /  ultrasonic field excitation  /  ignition delay period
Liming Di, Qiang Ouyang, Fuxiang Zhi, Cheng Shi. Acoustic Field Excitation and Regulation Characteristics of Iso-Octane Combustion Process[J]. Transactions of CSICE, 2024 , 42 (1) : 26 -34 . DOI: 10.16236/j.cnki.nrjxb.202401004
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Article Info
doi: 10.16236/j.cnki.nrjxb.202401004
  • Receive Date：2022-10-23
  • Online Date：2025-12-09
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  • Received：2022-10-23
  • Revised：2023-05-19
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Affiliations
    1.School of Vehicle and Energy，Yanshan University，Qinhuangdao 066004，China
    2.Hebei Key Laboratory of Special Delivery Equipment，Yanshan University，Qinhuangdao 066004，China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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