Simulation of Flows in Bottom Field of an External Expansion Annular Nozzles

  • A. L. KartashevEmail author
  • M. A. Kartasheva
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


The scheme of flow in external expansion annular nozzle with short-cut center body is considered. The characteristic feature of the flow in such nozzle is the presence of a developed separated field behind the bottom of the shortened central body, the parameters of which are determined by the shock-wave interaction of gas flows flowing from the minimum cross section of the nozzle, representing the annular split, the plane of which has a significant slope to the longitudinal axis of the nozzle. The conditions of the open bottom field and closed bottom field in annular nozzles of the viewed type depending on the value of the environment pressure are allocated. The considered configuration of the annular nozzle featured a significant increase in pressure on the surface of the central body as a result of the presence of a shock-wave system that occurs immediately after the gas flows through the annular split. The shock-wave flow pattern is determined for annular nozzle for condition of closed bottom field.


External expansion’s annular nozzle Pressure of environment Condition of bottom field Shock-wave flow’s pattern 


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Authors and Affiliations

  1. 1.South Ural State UniversityChelyabinskRussia

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