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Common design parameters of solid rocket motor
2022-07-01 17:38:00 【Michael. py】
The common design parameters of solid rocket motors are : mass ratio 、 thrust 、 Jet speed 、 Flow rate 、 Characteristic velocity 、 Thrust coefficient 、 working hours 、 Total impulse and specific impulse . This paper will introduce the theoretical definition function of these parameters .
1. mass ratio
mass ratio = Mass of propellant / Total engine mass
2. thrust
thrust
Equivalent jet velocity
Vacuum thrust
among ,F Is the thrust ,N;
Is the mass flow rate ,kg/s;
Is the jet speed ,m/s;
Is the sectional area of the nozzle ,
;
Is the nozzle outlet pressure ,p;
Is the atmospheric pressure outside ,p
3. Jet speed
Jet speed
Actual jet speed / Extreme jet speed
among ,k Is the specific heat ratio ;
Is the common air coefficient ,8.3144;m Is the average molecular weight ;T Is the combustion temperature ;
Is the expansion pressure ratio of nozzle ;
Is the actual jet speed ;
Extreme jet speed
4. Flow rate
Flow rate
Flow rate coefficient
Characteristic velocity
among ,
Is the function of specific heat ratio of gas ;
Is the nozzle inlet pressure ;
Is the critical cross-sectional area
5. Thrust coefficient
Thrust coefficient
6. Total impulse and specific impulse
Total impulse
Bichong
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