Effect factors of output performance for impulse thruster

In order to obtain the appropriate design parameter of the impulse thruster,the method for measuring the thrust with a test device was used.The thrust and impulse were studied of the thrusters with different diameter of nozzle throat,different thickness of sealed film and different mass of main charge.The diameter of nozzle throat varies from 3 mm to 4.5 mm.The thrust and impulse is maximal in condition of 4 mm nozzle throat.It shows that the thrust will not be maximal if the diameter of nozzle throat is more than 4 mm or less than 4 mm.When the thickness of sealed film varies from 0.2 mm and 0.5 mm,the thrust increases from 325 N to 429 N and impulse increases from 0.161 N·s to 0.216 N·s.The results show that if the thickness of sealed film become heavy,the thrust and impulse increase.When the mass of main charge varies from 180 mg to 420 mg,the thrust increases from 144 N to 347 N and the impulse increases from 0.068 5 N·s to 0.172 N·s.It shows that the thrust and impulse increase along with the increase of the mass of main charge.