Fred Catron

Iowa State University, Mechanical Engineering, Graduate Student

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Internationally experienced mechanical engineer with 24 years in the industrial valve industry, Bachelor's Degree in Mechanical Engineering Technology from the Milwaukee School of Engineering, Master of Engineering Degree in Engineering Mechanics from Iowa State University. Started career in the Fisher™ Valve Division (Emerson) working in the research flow lab, worked in areas such as developing new products, control valve testing, competitive analyses, nuclear qualification, flow induced vibration, noise prediction, customer field testing/analysis, project management, and engineering management. Left Fisher™ in 2010 to work at Weir Valves & Controls in the USA, after 16 months, relocated to their United Kingdom office, sharing time between the UK and South Korea valve companies as the Head of Nuclear Qualification for 5 years. Currently the Vice President of Engineering for Clarke Valve, based in Rhode Island. Holder of 8 United States patents and co-author of numerous technical papers on subjects like flow induced vibration, noise control in process plants, and piping system noise predictions that have been published in international proceedings, such as ASME, AGA, INCE, and Inter-Noise.
Address: United Kingdom

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Papers by Fred Catron

The Scaling of Pressure Fluctuations from Equal-Tee Piping Components for In-Plant Noise Prediction

An important element of in-plant noise modeling for high-speed gas flow, in addition to the noise... more An important element of in-plant noise modeling for high-speed gas flow, in addition to the noise generated by control valves, is the noise due to piping system components such as tees which becomes significant at high mass flow rates. An effective tool for the modeling of noise due to piping system components is non-dimensional pressure fluctuation scaling. The current paper outlines procedures for characterization of the internal noise due to an equal tee with unequal outlet flows using non-dimensional pressure fluctuation scaling. Experimental data is presented demonstrating general collapse of the measured data onto a single characteristic curve for several combinations of flow velocity and gas density under steady-state flow conditions. Flow ratios of 1:2, 1:3, 1:4 and 2:3 between each of the two outlet legs from the equal tee are considered, as well as the affect of gas density over a range of 345kPaG to 1380kPaG.Copyright © 2003 by ASME

Noise Generation and Propagation Effects on Piping System Components

In power plants and petrochemical plants, the piping systems form a network that extends througho... more In power plants and petrochemical plants, the piping systems form a network that extends throughout the facility. Various components in a piping system can be major sources of in-plant and community noise, both the pipe and the contained fluid can be noise propagation paths, and noise radiation can occur from the external surface of the piping. Though the basics of these phenomena are often understood, the translation into workable predictive tools has been slow. The experimental test program being undertaken to generate the required non-dimensionalized spectral data is outlined and the accuracy of pressure fluctuation scaling for pressure and flow rate is reviewed based on the equal tee test program.

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Noise level reduction of sparger assemblies

by Charles Depenning and Fred Catron

Fluid pressure reduction device for high pressure-drop ratios

by Charles Depenning and Fred Catron

Piping System Noise Issues: Multiple Noise Sources

by Charles Depenning and Fred Catron

ASME 2005 Power Conference, 2005

Noise abatement device and method for air-cooled condensing systems

by Charles Depenning and Fred Catron

Noise abatement device and method for air-cooled condensing systems

Fluid pressure reduction device for high pressure-drop ratios

Noise level reduction of sparger assemblies

Blow-Down Valve Noise and Interactions With Downstream Orifice Plates

Noise Control and Acoustics, 2003

Piping System Noise Issues: Multiple Noise Sources

ASME 2005 Power Conference, 2005

The Scaling of Pressure Fluctuations From Equal-Tee Piping Components for In-Plant Noise Prediction

Flow-Induced Vibration, 2003

Piping noise transmission loss calculations using finite element analysis

The prediction of noise radiated by piping downstream of a control valve is subject to various un... more The prediction of noise radiated by piping downstream of a control valve is subject to various uncertainties. One of the significant sources of uncertainty is the pipe-wall transmission loss. Due to the difficulties in experimentally measuring pipe-wall transmission loss accurately, and practical difficulties of taking into account pipe length and boundary conditions, an analytical/numerical approach for the calculation of transmission loss is required. The feasibility of coupled structural-acoustic finite element based calculations of transmission loss is being investigated for this purpose. This should also assist in the refinement of analytical/statistical calculations of transmission loss and noise radiation.

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Comparison of models for piping transmission loss estimations

Journal of The Acoustical Society of America, 2005

A frequency dependent model for the transmission loss of piping is important for accurate estimat... more A frequency dependent model for the transmission loss of piping is important for accurate estimates of the external radiation from pipes and the vibration level of the pipe walls. A statistical energy analysis model is used to predict the transmission loss of piping. Key terms in the model are the modal density and the radiation efficiency of the piping wall. Several available models for each are compared in reference to measured data. In low frequency octave bands, the modal density is low. The model of the transmission loss in these octave bands is augmented with a mass law model in the low frequency regime where the number of modes is small. The different models and a comparison of the models will be presented.

Piping noise transmission loss calculations using finite element analysis

Journal of The Acoustical Society of America, 2005

The prediction of noise radiated by piping downstream of a control valve is subject to various un... more The prediction of noise radiated by piping downstream of a control valve is subject to various uncertainties. One of the significant sources of uncertainty is the pipe-wall transmission loss. Due to the difficulties in experimentally measuring pipe-wall transmission loss accurately, and practical difficulties of taking into account pipe length and boundary conditions, an analytical approach for the calculation of transmission loss is required. The feasibility of uncoupled structural-acoustic finite element based calculations of transmission loss is being investigated for this purpose. By developing the use of finite element based calculations of transmission loss, it is hoped to provide a simple analysis procedure to quantify the effects of pipe length and boundary conditions on the noise level downstream of control valves in practical piping systems. It should also assist in the refinement of analytical/statistical calculations of transmission loss and noise radiation.

Measuring high frequency valve noise to evaluate interference with ultrasonic flow meters

by Fred Catron and Charles Depenning

Journal of The Acoustical Society of America, 2005

Ultrasonic flow meters are installed in lines with particular concern on the location of flow noi... more Ultrasonic flow meters are installed in lines with particular concern on the location of flow noise sources, such as valves and other geometry changes and restrictions in a piping system. The ultrasonic flow meter operates with a tone burst, typically in the range of 100 to 300 kHz. While, this frequency range is far above the typical range for noise control in piping systems, there is good evidence that the flow noise sources generate sound in the operating frequency range of the ultrasonic flow meter. The goal of the work was to establish a procedure to measure the noise generated by piping elements in the frequency range of the ultrasonic flow meter operation. The flow disturbance is placed upstream of the ultrasonic flow meter. The internal noise spectrum are measured at three locations, one upstream of the flow disturbance, one between the flow disturbance and the flow meter and one down stream of the flow meter. Some available results in the literature will be reviewed along with presenting the experimental setup and preliminary results. The results will show the capabilities of the measurements in this frequency range.

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Noise generation and propagation effects on piping system components

Noise Control Engineering Journal, 2009

Identification and prediction of piping system noise

Journal of The Acoustical Society of America, 2005

In a power plant environment, the piping systems form a network that extends throughout the facil... more In a power plant environment, the piping systems form a network that extends throughout the facility. Various components in a piping system can be major sources of in-plant and community noise, both the pipe and the contained fluid can be propagation paths, and radiation can occur from the external surface of the pipe. Though the basics of these phenomena are often understood, the translation into workable predictive tools has been slow. Too often, source, propagation, and radiation effects are treated as separate entities without allowing for the interactions that exist. The spectral characteristics of the sources will govern the type of response by the system. Pipe transmission loss models will change in pipe to duct transition areas. The status of these concepts will be reviewed with a discussion of current and possible future efforts to improve predictive tools.

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The Scaling of Pressure Fluctuations from Equal-Tee Piping Components for In-Plant Noise Prediction

Noise Generation and Propagation Effects on Piping System Components

Download

Noise level reduction of sparger assemblies

by Charles Depenning and Fred Catron

Fluid pressure reduction device for high pressure-drop ratios

by Charles Depenning and Fred Catron

Piping System Noise Issues: Multiple Noise Sources

by Charles Depenning and Fred Catron

ASME 2005 Power Conference, 2005

Noise abatement device and method for air-cooled condensing systems

by Charles Depenning and Fred Catron

Noise abatement device and method for air-cooled condensing systems

Fluid pressure reduction device for high pressure-drop ratios

Noise level reduction of sparger assemblies

Blow-Down Valve Noise and Interactions With Downstream Orifice Plates

Noise Control and Acoustics, 2003

Piping System Noise Issues: Multiple Noise Sources

ASME 2005 Power Conference, 2005

The Scaling of Pressure Fluctuations From Equal-Tee Piping Components for In-Plant Noise Prediction

Flow-Induced Vibration, 2003

Piping noise transmission loss calculations using finite element analysis

Download

Comparison of models for piping transmission loss estimations

Journal of The Acoustical Society of America, 2005

Piping noise transmission loss calculations using finite element analysis

Journal of The Acoustical Society of America, 2005

The prediction of noise radiated by piping downstream of a control valve is subject to various un... more The prediction of noise radiated by piping downstream of a control valve is subject to various uncertainties. One of the significant sources of uncertainty is the pipe-wall transmission loss. Due to the difficulties in experimentally measuring pipe-wall transmission loss accurately, and practical difficulties of taking into account pipe length and boundary conditions, an analytical approach for the calculation of transmission loss is required. The feasibility of uncoupled structural-acoustic finite element based calculations of transmission loss is being investigated for this purpose. By developing the use of finite element based calculations of transmission loss, it is hoped to provide a simple analysis procedure to quantify the effects of pipe length and boundary conditions on the noise level downstream of control valves in practical piping systems. It should also assist in the refinement of analytical/statistical calculations of transmission loss and noise radiation.

Measuring high frequency valve noise to evaluate interference with ultrasonic flow meters

by Fred Catron and Charles Depenning

Journal of The Acoustical Society of America, 2005

Download

Noise generation and propagation effects on piping system components

Noise Control Engineering Journal, 2009

Identification and prediction of piping system noise

Journal of The Acoustical Society of America, 2005

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