Browsing Gas Turbine Laboratory Reports by Subject "Compressors -- Blades"

Now showing items 1-13 of 13

    • Blade passage flow structure effects on axial compressor rotating stall inception 

      Hoying, Donald Andrew (Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1996], 1996)
      A new computational approach has been developed to study the inception of rotating stall in axial compressors. Using this approach the flow structures within the compressor blade passages have been examined in order to ...

    • Control of the unsteady flow in a stator blade row interacting with upstream moving wakes 

      Valkov, Theodore V. (Theodore Valkov) (Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1993], 1993)
      A computational study of the unsteady flow in a 2-D stator blade row interacting with upstream rotor wakes has been carried out. A direct spectral-element Navier-Stokes solver has been used for the laminar flow regime ...

    • Detailed time resolved measurements and analysis of unsteady flow in a transonic compressor 

      Ng, Wing (c1980, c1980)
      Detailed time and space resolved measurements for a transonic compressor stage have been completed in the MIT Blowdown Compressor Facility. The stage studied was a new first stage for a NASA two-stage machine which ...

    • The effect of upstream rotor vortical disturbances on the time-average performance of axial compressor stators 

      Valkov, Theodore V. (Theodore Valkov) (Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, 1997, 1997)
      Time-accurate Reynolds-averaged Navier-Stokes simulations have been carried out to investigate the impact of upstream rotor wakes and tip leakage vortices on the loss of a compressor stator. The objective is to (1) identify ...

    • Experimental investigation of Stator hub treatment in an axial flow compressor 

      Prell, Mark E. (Cambridge, Mass. : Gas Turbine & Plasma Dynamics Laboratory, Massachusetts Institute of Technology, [1981], 1981)
      An experiment was carried out to examine the effects, on stator stall margin and performance, of a slotted hub treatment rotating beneath the stator of an axial flow compressor. The compressor was run with this hub treatment ...

    • The influence of tip clearance on stall limits of a rectilinear cascade of compressor blades 

      Khabbaz, Ghassan R. (Ghassan Raji) (Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1959], 1959)
      An experimental study of the influence of tip clearance on the stall limits of compressor blades was conducted on a two dimensional rectilinear cascade. By using the mirror and image technique the end wall boundary layer ...

    • Lifting-line theory for subsonic axial compressor rotors 

      McCune, James E. (James Elliot); Dharwadkar, Shashikant Prabhakar (Cambridge, Mass. : Gas Turbine Laboratory , Massachusetts Institute of Technology, [1972], 1972)
      The three-dimensional compressible vortex theory of an axial compressor rotor or ducted fan is extended by relating blade loading to blade geometry in the lifting-line approximation. The resulting integral equation, which ...

    • Measurements of aerodynamic damping on the MIT transonic rotor 

      Crawley, Edward F. (Cambridge, Mass. : Gas Turbine & Plasma Dynamics Laboratory, Massachusetts Institute of Technology, [1981], 1981)
      A method has been developed and demonstrated for the direct measurement of aerodynamic forcing and aerodynamic damping of a transonic compressor. The method is based on the inverse solution of the structural dynamic equations ...

    • Rotor wake transport in turbomachine stators 

      Kumar, Ajay; Kerrebrock, Jack L. (Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1971], 1971)
      The mechanism of rotor wake interaction with stators has been examined experimentally by using helium, injected into the rotor wakes, as a tracer for the wake fluid. Time averaged helium Drofiles downstream of the stator, ...

    • Unconventional blade design for compressors 

      Gopalakrishnan, S. (Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1969], 1969)
      One of the factors causing the low efficiency of axial flow compressors operating at decreased flow rates is the flow separation at blade extremities. To postpone this tendency to separate to lower flow rates, compressor ...

    • Uniform-inlet three-dimensional transonic Beltrami flow through a ducted fan 

      Cheng, Wai Kong (Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine Laboratory, [1977], 1977)
      Introduction: This report is a continuation of a line of analytical treatment of three dimensional flows in compressor or ducted fans. In the earlier theories [1,2,9,10], the blade row is modelled as a set of spinning ...

    • Wake induced blade forces in turbo-machines 

      Lefcort, Malcolm D. (Malcolm David) (Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1962], 1962)
      The wake interaction problem in a turbo-machine has been simulated in a water table. The pressure distribution over a compressor blade during the passage of a wake shed by an upstream wake generator has been determined ...

    • Wave drag in transonic axial compressors 

      Okurounmu, Olufemi (Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine Laboratory, [1967], 1967)
      Profiles of fluid properties, including flow angle, static and total pressures have been obtained behind a free wheeling 8" diameter transonic rotor. The latter consists of 40 blades with double circular arc profiles, a ...