| 摘要 |
<p>A rocket nozzle has axially double bell shape, i.e. is of so-called 'Dual Bell' type, and has an outwardly directed change of curvature of the contour line or generatrix at the inflection point between the two bell shapes. For obtaining an improved cooling action on the nozzle wall the change of curvature amounts to between 2° and 7°, said inflection point (I) being located between a location at the area ratio ε = 10 and a location at 0,85 x εmax of the nozzle.</p> |
