Journal ArticleDOI
Effects of Rotation and Blade Incidence on Properties of Turbomachinery Rotor Wake
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TLDR
In this article, an experimental investigation of the effects of the speed of rotation on a turbomachinery rotor blade wake was conducted using a fan rotor in incompressible flow, and measurements were made at two different rotational speeds (1753 and 1010 rpm) with the same blade incidence angle.Abstract:
An experimental investigation of the effects of the speed of rotation on a turbomachinery rotor blade wake was conducted using a fan rotor in incompressible flow. Measurements were made at two different rotational speeds (1753 and 1010 rpm) with the same blade incidence angle. The blade incidence angle was also varied to discern the effect of blade loading. A three-sensor hot-wire probe mounted in a stationary frame of reference was used for the measurements made at several radial and axial stations in the near- and far-wake regions. The three-dimensional mean velocity and turbulence profiles, the wake defect, wake decay rate, turbulence intensities, and turbulence stresses are appreciably altered when the speed of rotation and the blade loading are changed. The wake defect is reduced and the radial velocity increased when the rotation speed is increased.read more
Citations
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Journal ArticleDOI
Characteristics of combustor diffusers
TL;DR: Combustor diffusers in aircraft engines are required to maintain stable and efficient combustion, to provide the turbine nozzles with an acceptable temperature profile as well as with sufficient cooling air and to minimise total pressure losses as mentioned in this paper.
Techniques for aerodynamic and turbulence measurements in turbomachinery rotors
TL;DR: In this paper, a review of rotor flow measurement techniques is presented, with particular reference to the measurement of the three-dimensional mean velocity, turbulence intensity, Reynolds stresses, static and stagnation pressures, and blade surface measurements.
Journal ArticleDOI
Turbulence Characteristics in the Near Wake of a Compressor Rotor Blade
B. Lakshminarayana,B. Reynolds +1 more
TL;DR: In this paper, a triaxial hot wire probe rotating with the rotor downstream of an axial flow compressor was used to measure the turbulence properties in the near wake of a rotating compressor blade.
Proceedings ArticleDOI
Effects of Periodic Unsteady Wake Flow and Pressure Gradient on Boundary Layer Transition Along the Concave Surface of a Curved Plate
TL;DR: In this article, the effects of periodic unsteady wakes on the concave surface of a turbine blade were investigated using a hot-wire probe and the ensemble-averaging technique.
Journal ArticleDOI
Unsteady viscous flow in a high-speed core compressor
M. A. Cherrett,J. D. Bryce +1 more
TL;DR: In this article, a probe incorporating a miniature high-frequency response pressure transducer has been traversed behind the first three stages of a high-speed multistage compressor operating at throttle settings corresponding to near choke, peak efficiency, and near surge.
References
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Journal ArticleDOI
The calculation of near-wake flows
Stephen B. Pope,J. H. Whitelaw +1 more
TL;DR: In this paper, the authors compared flow properties of two-dimensional isothermal wakes with and without recirculation, and found that the particular turbulence model is less important than the boundary condition assumed in the plane of the trailing edge of the body; though the Reynolds-stress models do provide a better representation of the individual normal stresses.
Techniques for aerodynamic and turbulence measurements in turbomachinery rotors
TL;DR: In this paper, a review of rotor flow measurement techniques is presented, with particular reference to the measurement of the three-dimensional mean velocity, turbulence intensity, Reynolds stresses, static and stagnation pressures, and blade surface measurements.
Journal ArticleDOI
Mean Velocity and Decay Characteristics of the Near and Far-Wake of a Compressor Rotor Blade of Moderate Loading
TL;DR: In this paper, the authors reported the experimental study of the three-dimensional characteristics of the mean velocity in the wake of a moderately loaded compressor rotor blade, which was taken with a three-sensor hot-wire probe rotating with the rotor.
Journal ArticleDOI
Techniques for aerodynamic and turbulence measurements in turbomachinery rotors
TL;DR: In this article, a review of rotor flow measurement techniques is presented, with particular reference to the measurement of the three-dimensional mean velocity, turbulence intensity, Reynolds stresses, static and stagnation pressures, and blade surface measurements.
Journal ArticleDOI
Characteristics of the Near Wake of a Compressor of a Fan Rotor Blade
TL;DR: In this article, the mean velocity, turbulence intensity, and Reynolds stress variations across the wake of a lightly loaded rotor blade at various axial and radial locations were investigated. And the wake is found to be three-dimensional in nature with appreciable radial velocity.
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