The invention provides a water
injection device and
system for a sub-combustible
ramjet water
swallowing test to solve the problem that the sub-combustible
ramjet engine flames out or the fuel-gas mixture cannot be ignited due to
swallowing liquid water during the
flight process. Including the water inlet
pipe and the liquid collection ring, the liquid collection ring includes N annular
pipe sections arranged concentrically, the water inlet
pipe is arranged along the radial direction of the annular pipe sections, and communicates with each annular pipe section; M nozzles are arranged on the liquid collection ring, The pipe wall of the annular pipe section has openings communicating with the nozzles, wherein M and N are positive integers. The
water spray device of the present invention has been successfully applied to a water
swallowing test of a certain type of sub-combustible
ramjet engine, and the test run test under simulated real working conditions has verified the feasibility and reliability of its work and guaranteed the progress of
model development.