I. FEDOTKIN'S SUPERSONIC NOZZLE FOR LIQUIDS OR GASES

摘要

A supersonic nozzle for liquids and gases comprises arranged in sequence nozzles 1, 2, 3, 4 those in between form the inner vacuum cavity 6, 7, 8 there the liquid flow comes to the branch pipe 10. The nozzles 1, 2, 3, 4 are arranged as conical, installed in sequence at common axial line, and narrow at the outlet, are placed with the branch pipe the body 5 and fixed with element 9 at the side of the branch pipe 10 the inner outlet surfaces of the last nozzle wit respect to the inner outlet surfaces of the previous nozzles have difference from 1to 5.Vacuum cavities as closed hermetic chambers 6, 7, 8 are placed between the inner surface of the next nozzle an the outer surface of the previous nozzle, cross sections of those in direction of flow narrow, diameter of the outlet from each specific nozzle is smaller compared to diameter of inlet to the next nozzle, at that the angle of narrowing is from 1, 5º to 6-8º. The nozzle claimed operates as follows, at gas flow through the nozzle in closed chambers between the nozzles rarefaction (vacuum) is formed, vacuum increases pressure drop at the nozzle, this leads to increase of gas flow speed, accelerated flow increases vacuum in the cavities between the nozzles, and this leads to following increase of pressure drop on the nozzle with following acceleration of gas flow, and so on till coming to supersonic velocity.