Noise and Vibration Related to the Patterns of Supersonic Annular Flow in a Pressure Reducing Gas Valve

Nakano, Masami; Outa, Eisuke; Tajima, Kiyohiro

doi:10.1115/1.3243511

Cited by 26 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nakano et al(6) showed similar effects and related them to the flow regime using Schlieren photography. The upstream pressure to the pressure reducing valve was varied from 13.6 barg to 1.7 barg at intervals of 1.7 barg.…”

mentioning

confidence: 79%

A Practical Solution to the Problem of Noise and Vibration in a Pressure Reducing Valve

Amini

Owen

1993

Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1993

View full text Add to dashboard Cite

This paper shows how the mechanical vibration that is occasionally found in gas pressure reducing valves can be eliminated by careful design of the valve plug and seat. A pressure reducing valve was found to be excessively noisy, producing a sound pressure level of 117 dB when throttling air at an inlet to outlet pressure ratio of 15 and exhausting to the atmosphere; as a result the valve suffered wear and vibration damage. By changing the design of the original flat plug and seat the problem was significantly reduced. A 60° conical plug and seat produced a noise reduction of 12 dB (a factor of 4 in actual sound pressure level), the mechanical vibration was eliminated and the flow capacity was increased significantly.

show abstract

mentioning

confidence: 79%

A Practical Solution to the Problem of Noise and Vibration in a Pressure Reducing Valve

Amini

Owen

1993

Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1993

View full text Add to dashboard Cite

show abstract

“…When the oil fluid (VG46) passes through the narrow passage formed by the poppet and the valve seat, the oscillating flow in the annular conical passage caused by the instability of the shear layer can be characterized by the Strouhal number (St), which is expressed as follows (Nakano et al, 1988…”

Section: Methodsmentioning

confidence: 99%

Squeal noise in hydraulic poppet valves

Zou

et al. 2016

J. Zhejiang Univ. Sci. A

View full text Add to dashboard Cite

The poppet valve is a fundamental component in fluid power systems. Under particular conditions, annoying "squeal" noises may be generated in hydraulic poppet valves. In the present study, the frequency spectrum of the squeal noise is obtained by analyzing the sampling data from the accelerometer mounted on the valve body. It is found that the flow velocity, pressure, and structural parameters have crucial effects on the properties of squeal noise, especially frequency. Larger valve chamber volume or lower backpressure leads to lower fundamental frequency of the squeal noise. An explanation for the squeal noise, as a result of Helmholtz resonance, is suggested and proved by experimental results.

show abstract

“…Several investigations show, that the most common causes of valve vibrations are oscillating shocks (Pluviose [4]), jet instabilities (Ziada and Bühlmann [5], Nakano et al [6]) and jet separations (Stastny [7], Morita [8]). High speed jets are generated at throttled operation when small pressure ratios exist and the flow path is constricted between the valve plug and the valve seat.…”

Section: Literature Reviewmentioning

confidence: 99%

Modification of a Steam Valve Diffuser for Enhanced Full Load and Part Load Operation Using Numerical Methods

Domnick

Benra

Brillert

et al. 2016

Period. Polytech. Mech. Eng.

View full text Add to dashboard Cite

The flow in a steam turbine inlet valve is investigated and improved by numerical methods. From the fluid dynamic point of view two requirements exist: Low pressure losses are desired at the fully opened valve position and dynamic fluid forces acting on the valve plug should be minimized to reduce valve vibration. Usually these undesired dynamic fluid forces occur when the flow is throttled at part load. It is found that these fluid forces are generated by separated jets in the diffuser. The attachment and the separation of the jet are related to the Coanda effect.By understanding the flow physics a way is found to modify the diffuser design in such a way that the flow separations are reduced. Bell-shaped diffusers are able to reduce the flow losses at full load operation. A diffuser contour that fulfils both requirements is developed.

show abstract

Noise and Vibration Related to the Patterns of Supersonic Annular Flow in a Pressure Reducing Gas Valve

Cited by 26 publications

References 0 publications

A Practical Solution to the Problem of Noise and Vibration in a Pressure Reducing Valve

A Practical Solution to the Problem of Noise and Vibration in a Pressure Reducing Valve

Squeal noise in hydraulic poppet valves

Modification of a Steam Valve Diffuser for Enhanced Full Load and Part Load Operation Using Numerical Methods

Contact Info

Product

Resources

About