In this article the procedures are de-scribed for determining free-vortex segment properties.Characteristics method is used to design nozzle Milch produces free-vortex seg-ment. 本文提出了確定氣動窗口所需自由旋渦氣動特性的過程，討論了特徵線方法在非對稱超音速噴管設計中的應用，該噴管被用來產生自由旋渦流動。
Two types of solid micro-thruster structure won designed based on MEMS technique, one of which with discrete and abnormal laval nozzle. 摘要設計了兩種基於微光機電技術的固體微推力器結構，其中一種結構具有不連續的非正常拉瓦爾噴管。
Making use of these results, we obtained an exact solution for the incompressible potential flow through a two-dimensional Laval nozzle. 利用這些結果得到了二元拉伐爾噴管內不可壓縮位勢流動的精確解。
