| 摘要 |
A pulsating combustor includes a combustion chamber having a hollow cylindrical form and a tailpipe having a similar hollow cylindrical form, such that the internal chambers are annular in section. Air and fuel are admitted to the combustion chamber and pulsating combustion is initiated, with exhaust gases being removed from the tailpipe. A water jacket is defined both inside and outside the pulsating combustor, with water being moved from one to the other as it is being warmed. Fuel is preferably admitted along needles or short pipes which are such as to have a natural resonant frequency which is a small number multiple of the natural resonant frequency of the combination of the combustion chamber and the tailpipe. Preferred frequencies are 440 cps for the combination combustion chamber and tailpipe, and 1320 cps for the fuel delivery needle or pipe. |
