Research progresses and prospect of powdered fuel engine propellant feeding
The development history and research progresses of pneumatic driven piston type and motor driven piston type powder fuel engine propellant feeding systems were introduced.The characteristics,advantages and disadvantages of choked and non-choked powder supply were compared and analyzed.The principle and existing problems of mass flow measurement methods of feeding system,including piston displacement method and weighing method,were illustrated.By summarizing and analyzing related researches on powdered fuel engine feeding system,the following conclusions were drawn:the integration of pneumatic driven piston type was higher,the effect of piston controlling of motor driven piston type was better;the stability of choked powder supply was stronger,yet the utilization rate of air of non-choked powder supply was higher;the precision in measuring flow rate of gravimetric method was higher,yet the scope of application of piston displacement method was wider.The development directions such as optimizing the feeding system structure,exploring the mechanism of choking flow and establishing the relationship model of flow parameters were put forward for further development.
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