On Fast-Response Probes: Part 2—Aerodynamic Probe Design StudiesSource: Journal of Turbomachinery:;1995:;volume( 117 ):;issue: 004::page 618DOI: 10.1115/1.2836580Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The influence of the probe size and geometry on the quality of fast-response measurements in turbomachines has been experimentally investigated. For investigations in the static domain (time-independent flows) probes were calibrated in two continuously operating wind tunnels in the range 0.2 < M < 1.2. For dynamic calibrations in time-variant flows model experiments in water (0.025 < k < 0.4, reduced frequency) were performed. Aerodynamic characteristics were determined for a great number of probe geometries, such as circular cylinders and wedge-type probes with varied apex angles, locations of the sensing holes, and leading edge shapes. The experiments comprised investigations in tolerance ranges for prismatic total pressure probes, yaw angle sensitivity, yaw angle, and Mach number effects on calibration and influence of dynamic yaw angle fluctuation on probe characteristics. As a result of the experiments errors due to static and dynamic aerodynamic effects could be quantified. The majority of the errors arising during measurements in turbomachines can be directly related to the probe size. An important number of these errors are systematic and can be analytically modeled and hence their influence corrected. In fluctuating flows the most severe measurement errors, which often may exceed the quantity of interest, are due to dynamic stall effects. This phenomenon, which is of transient nature and cannot be corrected, is typical for sharp wedge probes, but is not present with circular cylinders, and the effects are much smaller with very blunt wedges.
keyword(s): Design , Probes , Errors , Flow (Dynamics) , Wedges , Yaw , Turbomachinery , Measurement , Calibration , Circular cylinders , Geometry , Pressure , Mach number , Water , Shapes AND Wind tunnels ,
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contributor author | H. J. Humm | |
contributor author | C. R. Gossweiler | |
contributor author | G. Gyarmathy | |
date accessioned | 2017-05-08T23:48:34Z | |
date available | 2017-05-08T23:48:34Z | |
date copyright | October, 1995 | |
date issued | 1995 | |
identifier issn | 0889-504X | |
identifier other | JOTUEI-28646#618_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/116118 | |
description abstract | The influence of the probe size and geometry on the quality of fast-response measurements in turbomachines has been experimentally investigated. For investigations in the static domain (time-independent flows) probes were calibrated in two continuously operating wind tunnels in the range 0.2 < M < 1.2. For dynamic calibrations in time-variant flows model experiments in water (0.025 < k < 0.4, reduced frequency) were performed. Aerodynamic characteristics were determined for a great number of probe geometries, such as circular cylinders and wedge-type probes with varied apex angles, locations of the sensing holes, and leading edge shapes. The experiments comprised investigations in tolerance ranges for prismatic total pressure probes, yaw angle sensitivity, yaw angle, and Mach number effects on calibration and influence of dynamic yaw angle fluctuation on probe characteristics. As a result of the experiments errors due to static and dynamic aerodynamic effects could be quantified. The majority of the errors arising during measurements in turbomachines can be directly related to the probe size. An important number of these errors are systematic and can be analytically modeled and hence their influence corrected. In fluctuating flows the most severe measurement errors, which often may exceed the quantity of interest, are due to dynamic stall effects. This phenomenon, which is of transient nature and cannot be corrected, is typical for sharp wedge probes, but is not present with circular cylinders, and the effects are much smaller with very blunt wedges. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | On Fast-Response Probes: Part 2—Aerodynamic Probe Design Studies | |
type | Journal Paper | |
journal volume | 117 | |
journal issue | 4 | |
journal title | Journal of Turbomachinery | |
identifier doi | 10.1115/1.2836580 | |
journal fristpage | 618 | |
journal lastpage | 624 | |
identifier eissn | 1528-8900 | |
keywords | Design | |
keywords | Probes | |
keywords | Errors | |
keywords | Flow (Dynamics) | |
keywords | Wedges | |
keywords | Yaw | |
keywords | Turbomachinery | |
keywords | Measurement | |
keywords | Calibration | |
keywords | Circular cylinders | |
keywords | Geometry | |
keywords | Pressure | |
keywords | Mach number | |
keywords | Water | |
keywords | Shapes AND Wind tunnels | |
tree | Journal of Turbomachinery:;1995:;volume( 117 ):;issue: 004 | |
contenttype | Fulltext |