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Thursday, July 23, 2020 | History

4 edition of Measurement of fan response to unsteady pressure found in the catalog.

Measurement of fan response to unsteady pressure

François Gosselin

Measurement of fan response to unsteady pressure

by François Gosselin

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  • 15 Currently reading

Published by National Library of Canada = Bibliothèque nationale du Canada in Ottawa .
Written in English


Edition Notes

SeriesCanadian theses = Thèses canadiennes
The Physical Object
FormatMicroform
Pagination4 microfiches.
ID Numbers
Open LibraryOL18649128M
ISBN 100315655577
OCLC/WorldCa28495814

This textbook is a collection of technical papers that were presented at the 10 th International Symposium on Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines held September , at Duke University in Durham, North Carolina. The papers represent the latest in state of the art research in the areas of aeroacoustics, aerothermodynamics, computational methods. Pressure measurement is the analysis of an applied force by a fluid (liquid or gas) on a surface. Pressure is typically measured in units of force per unit of surface techniques have been developed for the measurement of pressure and ments used to measure and display pressure in an integral unit are called pressure meters or pressure gauges or vacuum gauges.

The frequency response curves of the turbulent BL pressure responses at different wind speeds (10, 15, 20, 25 and 30 m/s) are plotted in Figure 5. As the wind speed is increased, the trend of the pressure response (each curve) remains basically unchanged, and the numerical values increase uniformly at different frequencies; the pressure. Get this from a library! Linearized unsteady aerodynamic analysis of the acoustic response to wake/blade-row interaction. [Joseph M Verdon; NASA Glenn Research Center.] -- "The three-dimensional, linearized Euler analysis, LINFLUX, is being developed to provide a comprehensive and efficient unsteady aerodynamic scheme for predicting the aeroacoustic and aeroelastic.

Free response of the second-order pressure transducer model 26 Harmonic response of the second-order pressure transducer model 26 Transient response of the second-order pressure transducer model 29 Interaction with another dynamic system 31 Correction of the dynamic measurement data Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines and Propellers by H.M. Atassi, , available at Book Depository with free delivery worldwide.


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Measurement of fan response to unsteady pressure by François Gosselin Download PDF EPUB FB2

Unsteady pressure measurements on a more general level have been the topic of various interesting review papers in which more information can be found [7][8][9][10] [11] [12].

In this paper, a. A fast-response pressure-sensitive paint (PSP) technique was applied to the measurement of unsteady surface pressure of an oscillating cascade blade in a transonic flow.

A linear cascade was used, and its central blade was oscillated in a translational by: 4. Pressure-sensitive paint (PSP) is another technique that can be used to measure the unsteady surface pressure. This technique requires the surfaces to be coated in a transparent polymer binder, which causes the molecules within to be excited to a higher energy state as they are illuminated by light of a specific by: 2.

An unsteady pressure measurement system was developed to measure the unsteady pressure field of an axial fan. The results showed that there is a relatively long response time for pressure drop. response characterized by wing first-bending motion was unexpectedly encountered near M = Con-sequently, further tests for measurement of steady surface-pressure, static wing defections (refs.

6 and 7), and unsteady surface pressure associated with control surface oscillation (ref. 8) were limited to M = or less to prevent possible. Aerodynamic phenomena such as wakes behind bluff bodies are inherently unsteady.

Thus, many aerodynamic experiments require the measurement of unsteady or dynamic flow characteristics such as surface or base pressure on the body. Pressure-measuring instruments (pressure transducers) have a transient response that depends on two factors: (1) the response of the transducer elements that.

This paper presents a unique set of unsteady pressure measurements during a surge and rotating stall event in a modern transonic high speed single stage axial flow fan rig.

The unsteady pressure data were acquired using an array of 22 high frequency response Kulite transducers positioned over the rotor tip to show detail of the in-passage flow. Pasquale M. Sforza, in Theory of Aerospace Propulsion (Second Edition), Fan Flow, Stations F.

The fan provides an increase in stagnation pressure from the inlet value as given by the fan pressure ratio p t,3F /p t, mentioned previously, current engines operate in the range fan flow with the hot. The greater the change in air pressure, the louder the resulting noise will be. Measurement of Noise.

The noise level of Oriental Motor fans is measured in the A-weighted sound pressure level at a distance of 1 m ( ft.) from the intake side (at a point above the center line of the intake side).

The question remains on which fan pressure should be used when a fan is included in the route of a pressure survey. The simple answer is that for main surface fans it is fan static pressure (FSP) that should be employed.

For a main forcing fan the FSP is given by the gauge static pressure at the inby side of the fan (Figure (b)). Unsteady Total Temperature Measurements Downstream of a High-Pressure Turbine 1 October | Journal of Turbomachinery, Vol. No. 4 Best Paper Award—Structures and Dynamics Committee: A Coupled Mode Analysis of Unsteady Multistage Flows in Turbomachinery.

Fan—Inlet and Outlet Unsteady Pressure Field Measurement C. Xu, R. Amano, and R. Perez Department of Mechanical Engineering, University of Wisconsin–Milwaukee, Milwaukee, Wisconsin, USA The unsteady pressure characteristics at inlet and outlet of an axial fan were measured in this study.

Comparison of unsteady pressure fields on turrets with different surface features using pressure-sensitive paint 5 January | Experiments in Fluids, Vol. 55, No. 1 Study of Unsteady Surface Pressure on a Turret via Pressure-Sensitive Paint.

W. Zhou, D. Peng, X. Wen, Y. Liu, and H. Hu, “ Unsteady analysis of adiabatic film cooling effectiveness behind circular, shaped, and sand-dune–inspired film cooling holes: Measurement using fast-response pressure-sensitive paint,” Int.

Heat Mass Transfer– (). A benchmark of different measurement techniques is presented to characterize the dynamic response of a synthetic jet actuator working in compressible regime. The setup involves a piston-based synthetic jet, as well as the benchmarked measurements are hot-wire, cold-wire, Laser Doppler Anemometry, pressure transducer, and Schlieren visualization.

Measured flow temperatures range from 20 °C. Prediction of the dynamic response of complex transmission line systems for unsteady pressure measurements. C Antonini 1, G Persico 2 and A L Rowe 3.

Published 13 October • IOP Publishing Ltd Measurement Science and Technology, Vol Number electronic books conference papers and proceedings of models to predict low engine order excitation in a high pressure turbine stage --experimental reduction of transonic fan forced response by igv flow control --multistage effects --unsteady aerodynamic work on oscillating annular cascades unsteady pressure measurement with correction.

Pressure measurement 4 Applications • Altimeter • Barometer • MAP sensor • Pitot tube • Sphygmomanometer Instruments Many instruments have been invented to measure pressure, with different advantages and disadvantages. Pressure range, sensitivity, dynamic response and cost all vary by several orders of magnitude from one instrument.

Unsteady Pressure Field Investigation of an Axial Fan—Blade Unsteady Pressure Field Measurement. Xu 1 and R. Amano 1,2. 1 Department of Mechanical Engineering, University of Wisconsin–Milwaukee, USA.

2 Mechanical Engineering Department, University of Wisconsin–Milwaukee, EMS Building, P. BoxUSA. Pressure on the return side of the duct system will be highest at the inlet of the fan in the equipment.

The lowest pressure on the return side of the duct system is usually found right before air enters the return grille. An instrument used to measure pressure is called a “ma-nometer.” The most common manometer is a Magnehelic gauge. They are typically not suited for static pressure measurements.

Dynamic pressure measurements including turbulence, blast, ballistics, and engine combustion require sensors with special capabilities. These capabilities include fast response, ruggedness, high stiffness, extended ranges, and the ability to measure quasi­ static pressures.Part 7: Experimental unsteady aerodynamics-Experimental and numerical study of nonlinear interactions in two-dimensional transonic nozzle flow-Interaction between shock waves and cascaded blades-Measured and calculated unsteady pressure field in a vaneless diffuser of a centrifugal compressor-DPIV measurements of the flow field between a.In simplest terms, if you have a 5 ft x 5 ft x 5 ft enclosure, and a fan that produces 5 CFM, it will likely take 25 minutes for the fan to ventilate the hot air in the enclosure.

(In actuality, it's not that easy.) Static pressure is the amount of air pressure that can be produced by the fan in an enclosure.