Articles Posted in the " Flow Through Nozzles " Category

  • NOZZLE HIGHLIGHTS

    NOZZLE HIGHLIGHTS

    NOZZLE HIGHLIGHTS  It  converts pressure into kinetic energy. No work done in a nozzle. There is no energy transfer in a nozzle. Nozzle is considered horizontal unless otherwise stated i. e. Z1 = Z2 Convergent nozzle is used in industry as spray nozzles. All air crafts use convergent nozzles. Steam turbines use convergent –divergent nozzles. […]


  • NOZZLE AND DIFFUSER-2

    NOZZLE AND DIFFUSER-2

      NOZZLE AND DIFFUSER-2 Keywords: Nozzle-diffuser-efficiency-velocity coefficient COMPARISON OF NOZZLES AND DIFFUSER Nozzle                                                 DIFFUSER Boundary layer is thin                      Boundary layer is thick. Has negligible friction                      Has more friction. Has favorable gradient                     Unfavorable gradient More efficient                      […]


  • Nozzle and diffuser-1

    Nozzle and diffuser-1

    Nozzle and diffuser-1  Definition of a nozzle It is a duct (passage) of variable cross section (area decreases from entrance onward) in which velocity increases and pressure decreases. It is true as long as velocity at the inlet of the nozzle is sub-sonic i.e. velocity is less the velocity of sound or Mach number <1. […]


  • * STEAM NOZZLES

    * STEAM NOZZLES

    STEAM NOZZLES NOZZLES A nozzle is a passage of variable cross section. A nozzle is used to produce high velocity jet by converting   (i) Pressure energy into kinetic energy   (ii) Enthalpy into kinetic energy   (iii) Solar energy into electrical energy These jets may be (a) Sub-sonic (b) Sonic  (c) Super-sonic These jets […]


  • * Boundary Layer Separation

    * Boundary Layer Separation

    BOUNDARY LAYER SEPARATION When fluid flows past a body (cylinder or an aeroplane), fluid is accelerated due to pressure drop and ∂p/∂x is negative (pressure decreases as x increases). Here ∂p/∂x becomes zero. Velocity decreases and separation of flow occurs and back flow is just to start. At the point of separation, the following are […]