燃烧科学与技术
燃燒科學與技術
연소과학여기술
JOURNAL OF COMBUSTION SCIENCE AND TECHNOLOGY
2010年
1期
85-91
,共7页
脉冲爆轰发动机%守恒元和求解元方法%两相爆轰%数值计算
脈遲爆轟髮動機%守恆元和求解元方法%兩相爆轟%數值計算
맥충폭굉발동궤%수항원화구해원방법%량상폭굉%수치계산
pulse detonation engine%conservation element and solution element method%two-phase detonation%numerical calculation
应用二维守恒元和求解元方法数值模拟脉冲爆轰发动机内汽油/空气两相燃烧转爆轰的过程.分析了爆轰波从开始产生到形成稳定的全过程.研究了点火能量对燃烧转爆轰过程的影响:点火能量越小,DDT时间越长;若点火能量过小就不能形成DDT.同时研究了液滴半径对爆轰参数的影响:液滴半径增大,爆轰波压力和速度随之减小,DDT时间增加;液滴半径过大,则爆轰波不能形成.爆轰波压力计算值与实验值两者趋势符合得较好.
應用二維守恆元和求解元方法數值模擬脈遲爆轟髮動機內汽油/空氣兩相燃燒轉爆轟的過程.分析瞭爆轟波從開始產生到形成穩定的全過程.研究瞭點火能量對燃燒轉爆轟過程的影響:點火能量越小,DDT時間越長;若點火能量過小就不能形成DDT.同時研究瞭液滴半徑對爆轟參數的影響:液滴半徑增大,爆轟波壓力和速度隨之減小,DDT時間增加;液滴半徑過大,則爆轟波不能形成.爆轟波壓力計算值與實驗值兩者趨勢符閤得較好.
응용이유수항원화구해원방법수치모의맥충폭굉발동궤내기유/공기량상연소전폭굉적과정.분석료폭굉파종개시산생도형성은정적전과정.연구료점화능량대연소전폭굉과정적영향:점화능량월소,DDT시간월장;약점화능량과소취불능형성DDT.동시연구료액적반경대폭굉삼수적영향:액적반경증대,폭굉파압력화속도수지감소,DDT시간증가;액적반경과대,칙폭굉파불능형성.폭굉파압력계산치여실험치량자추세부합득교호.
The method of two-dimensional conservation element and solution element is employed to simulate the gasoline/air interior flow field of pulse detonation engine. The development process of detonation is discussed. Ignition energy has great effect on DDT time. As ignition energy decreases, DDT time increase. If ignition energy is too small, DDT can't form. Liquid radius has also great effect on detonation parameters. The bigger droplet radius is, the smaller detonation pressure and velocity are, and the longer DDT time is. Detonation wave will fail to from if radius is too big. The numerical calculation results agree well with the experimental results, and the conclusions can be applied to PDE design and experimental study.
