Author: Vijay JadhavPublisher:
ISBN: 9783330027107
Category :
Languages : en
Pages : 80
Book Description
Fabrication and Calibration of Five Hole Pressure Probe
Author: Vijay JadhavPublisher:
ISBN: 9783330027107
Category :
Languages : en
Pages : 80
Book Description
Theoretical Derivation and Calibration Technique of a Hemispherical-tipped, Five-hole Probe
Author: Scott O. KjelgaardPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 32
Book Description
Calibration and Data Reduction for a Five-hole Probe
Author: Joint Institute for Aeronautics and Acoustics. Joint Institute for Aeronautics and AcousticsPublisher:
ISBN:
Category :
Languages : en
Pages : 88
Book Description
The Design And Validation of a Calibration Jet for Five-hole Pressure Probes
Author: Mark D'imperioPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A five-hole probe is a unique measuring device that can provide information on a flow field's three dimensional velocity vector. Many laboratories studying turbomachinery can utilize these probes to gather important information on complex flows that CFD software cannot always provide accurately. However, these probes can be difficult to calibrate and many laboratories do not have the capability of running their own calibrations. Often, they have to rely on the manufacturer's original calibration which can become inaccurate over time. This thesis presents the construction and validation of a five-hole probe calibration system.The calibration system designed in this research produces an air-jet in which the velocity and pressure can be measured by pressure taps built into the sides of the rig's piping. The system involves a series of pipes with a section of packed straws and three screens to reduce turbulence and straighten the flow in the system. To handle the probe's position and orientation, a traverse and rotary table system was built to control the probe both manually and through automation. The probe can then be orientated at various pitch and yaw angles to gather calibration data in the air-jet.This thesis demonstrates calibration runs for the intended use of the probe at Re[almost equal to]4842. After running repeated tests it was determined that the probe could produce reliable data for ranges of ±10o at this Reynold's number. Having the system in the lab also gives the ability to recalibrate the probe for other values for Re which may have other ranges of useable data.
A New Algorithm for Five-Hole Probe Calibration, Data Reduction, and Uncertainty Analysis
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781725003941
Category :
Languages : en
Pages : 36
Book Description
A new algorithm for five-hole probe calibration and data reduction using a non-nulling method is developed. The significant features of the algorithm are: (1) two components of the unit vector in the flow direction replace pitch and yaw angles as flow direction variables; and (2) symmetry rules are developed that greatly simplify Taylor's series representations of the calibration data. In data reduction, four pressure coefficients allow total pressure, static pressure, and flow direction to be calculated directly. The new algorithm's simplicity permits an analytical treatment of the propagation of uncertainty in five-hole probe measurement. The objectives of the uncertainty analysis are to quantify uncertainty of five-hole results (e.g., total pressure, static pressure, and flow direction) and determine the dependence of the result uncertainty on the uncertainty of all underlying experimental and calibration measurands. This study outlines a general procedure that other researchers may use to determine five-hole probe result uncertainty and provides guidance to improve measurement technique. The new algorithm is applied to calibrate and reduce data from a rake of five-hole probes. Here, ten individual probes are mounted on a single probe shaft and used simultaneously. Use of this probe is made practical by the simplicity afforded by this algorithm. Reichert, Bruce A. and Wendt, Bruce J. Glenn Research Center NASA-TM-106458, E-8319, NAS 1.15:106458 RTOP 505-62-52...
A New Algorithm for Five-hole Probe Calibration, Data Reduction, and Uncertainty Analysis
Author: Bruce A. ReichertCalibration of Five-hole Directional Pressure Probes
Author: P. G. SmithPublisher:
ISBN:
Category : Static pressure probes
Languages : en
Pages : 50
Book Description
Determination of the Velocity Vector and the Total Pressure with a Calibrated Fixed-attitude Five-hole Probe,.
Author: G. J. VoermanCalibration of Seven-hole Pressure Probes for Use in Fluid Flows with Large Angularity
Author: Gregory G. ZilliacPublisher:
ISBN:
Category : Static pressure probes
Languages : en
Pages : 60
Book Description
Author: A.L. Treaster