The experimental results show that,by fuel jet impinging on the head tip at a pintle nozzle,the fuel spray diffusion angle had been enlarged and its penetration much shortened,but the drop sizes remained almost unchanged.
It is analyzed the variation rule on K value, diffuse angle of reclined probe along with temperature, separately educed their each mathematic expressions and discussed the affection of temperature to inspection sensitivity and defects quantitative and orientation and solution in accordance with sound speed of ultrasound longitudinal wave change along with the temperature among a certain organic glass.
Finally, from two aspects said above, the diffuse-angle of condenser throat is optimized and discussed, and come into a conclusion: the pressure loss of the throat can be reduced with enlarging the throat-angle within critical diffuse-angle, while smaller throat-angle leads to a more even flowfield at throat outlet.
On the base of the experiments of the new pump performance, we get the principal parameters (area rate m, diffused angle a2, pipe inlet angle a1, and the pipe length l4). Then the jet pump depending in the optimum parameters is designed. So, the life of new pump is prolonged and the mean time between failures is extended.
Researches show that the differences of arc diffused angles between acid and metallic slag system wires are marginal under all welding parameters. The arc diffused angle of basic wire is smaller than the other two types under high welding parameter because of abundant counterpoised ionization elements in flux.