CAJ | 학술논문

对新型300 Hz质量片-膜环路双作用热声发动机的多单元结构进行了研究，详细考察了3单元、4单元、5单元、6单元结构下系统无负载和外接负载时的性能。系统无负载时，重点考察了发动机单元中核心参数的沿程分布；系统接负载时，重点考察了输出特性和最佳负载阻抗下加热功率对系统性能的影响。计算结果表明，增加环路双作用热声发动机的单元数会导致热声转换效率的降低，但能显著提高系统的输入加热功率，从而使系统获得更多的总输出声功。
대신형300 Hz질량편-막배로쌍작용열성발동궤적다단원결구진행료연구，상세고찰료3단원、4단원、5단원、6단원결구하계통무부재화외접부재시적성능。계통무부재시，중점고찰료발동궤단원중핵심삼수적연정분포；계통접부재시，중점고찰료수출특성화최가부재조항하가열공솔대계통성능적영향。계산결과표명，증가배로쌍작용열성발동궤적단원수회도치열성전환효솔적강저，단능현저제고계통적수입가열공솔，종이사계통획득경다적총수출성공。
A novel multi-unit 300 Hz double-acting thermoacoustic heat engine was investigated , main-ly by analyzing the non-load and on-load thermodynamic performance of the 3-unit, 4-unit, 5-unit, 6-unit double-acting thermoacoustic heat engines .Based on thermoacoustic theory , the distributions of key physi-cal parameters of the no-load system were presented for a better understanding of the energy conversion process in the multi-unit systems .Furthermore , the influence of input heating power on the on-load system performance was investigated under the optimal load impedances , which were determined by the output characteristics of the multi-unit systems .According to the calculated results , increasing the number of the units leads to the lower thermoacoustic conversion efficiency , but the total output acoustic power can be ob-tained because of more units used .