Search Results - "Heyns, P. S."

Thermal analysis of porous fins enclosure with the comparison of analytical and numerical methods by Hoseinzadeh, S., Heyns, P. S., Chamkha, A. J., Shirkhani, A.

“…In this study, heat transfer though a porous fin with rectangular cross section is investigated. The Darcy model is utilized to simulate heat transfer in this…”
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Energy and economic analysis of evaporative vacuum easy desalination system with brine tank by Kariman, H., Hoseinzadeh, S., Shirkhani, A., Heyns, P. S., Wannenburg, J.

“…Nowadays, the freshwater is one of the most critical issues for humans. In this regard, desalination systems can be beneficial. In this research, at first…”
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Sensitivity analysis of combined cycle parameters on exergy, economic, and environmental of a power plant by Javadi, M. A., Hoseinzadeh, S., Ghasemiasl, R., Heyns, P. S., Chamkha, A. J.

“…In this paper, a typical combined cycle power generation unit in Iran is simulated by a mathematical method in order to perform sensitivity analysis on…”
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Impeller fault detection under variable flow conditions based on three feature extraction methods and artificial neural networks by Jami, A., Heyns, P. S.

“…Nonstationary flow conditions can introduce complexities and nonlinear characteristics to pumping systems. This paper presents comparative studies of impeller…”
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Application of computed order tracking, Vold–Kalman filtering and EMD in rotating machine vibration by Wang, K.S., Heyns, P.S.

“…This paper presents a study on rotating machine vibration signals by using computed order tracking, Vold–Kalman filtering and intrinsic mode functions from the…”
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The combined use of order tracking techniques for enhanced Fourier analysis of order components by Wang, K.S., Heyns, P.S.

“…Order tracking is one of the most important vibration analysis techniques for diagnosing faults in rotating machinery. It can be performed in many different…”
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Feasibility of Rotor Fault Detection from a Fluid Dynamics Perspective by Robbins, S L, Heyns, P S, Heyns, J A

“…The majority of condition monitoring techniques employed today consider the acquisitioning and analysis of structural responses as a means of profiling machine…”
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A comparative study of finite element methodologies for the prediction of torsional response of bladed rotors by Scheepers, R., Heyns, P. S.

“…The prevention of torsional vibration-induced fatigue damage to turbo-generators requires determining natural frequencies by either field testing or…”
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Development of a tool wear-monitoring system for hard turning by Scheffer, C., Kratz, H., Heyns, P.S., Klocke, F.

“…This paper describes an in-depth study on the development of a system for monitoring tool wear in hard turning. Hard turning is used in the manufacturing…”
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Machine and component residual life estimation through the application of neural networks by Herzog, M.A., Marwala, T., Heyns, P.S.

“…This paper concerns the use of neural networks for predicting the residual life of machines and components. In addition, the advantage of using…”
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Instantaneous angular speed monitoring of gearboxes under non-cyclic stationary load conditions by Stander, C.J., Heyns, P.S.

“…Recent developments in the condition monitoring and asset management market have led to the commercialisation of online vibration-monitoring systems. These…”
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Online condition monitoring of axial-flow turbomachinery blades using rotor-axial Eulerian laser Doppler vibrometry by Oberholster, A.J., Heyns, P.S.

“…The ability to monitor the vibration of blades online is of great importance to the structural health of turbomachinery. This paper focuses on the fixed…”
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Eulerian laser Doppler vibrometry: Online blade damage identification on a multi-blade test rotor by Oberholster, A.J., Heyns, P.S.

“…Laser Doppler vibrometry enables the telemetry-free measurement of online turbomachinery blade vibration. Specifically, the Eulerian or fixed reference frame…”
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Numerical investigation of heat transfer of laminar and turbulent pulsating Al2O3/water nanofluid flow by Hoseinzadeh, S., Heyns, P.S., Kariman, H.

“…Purpose The purpose of this paper is to investigate the heat transfer of laminar and turbulent pulsating Al203/water nanofluid flow in a two-dimensional…”
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An industrial tool wear monitoring system for interrupted turning by Scheffer, C., Heyns, P.S.

“…An effective wear-monitoring system for machine tool inserts could yield significant cost savings for manufacturers. Over the years, various methods have been…”
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Transmission path phase compensation for gear monitoring under fluctuating load conditions by Stander, C.J., Heyns, P.S.

“…Vibration can be monitored under fluctuating load conditions if provision is made for taking into account the fluctuation in machine speed, the response…”
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Constant speed tip deflection determination using the instantaneous phase of blade tip timing data by Diamond, D.H., Heyns, P.S., Oberholster, A.J.

“…•Blade Tip Timing proximity probe signals are converted into the angular domain.•Instantaneous phase information, using a quadrature filter, is used to…”
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USING VIBRATION MONITORING FOR LOCAL FAULT DETECTION ON GEARS OPERATING UNDER FLUCTUATING LOAD CONDITIONS by STANDER, C.J., HEYNS, P.S., SCHOOMBIE, W.

“…Gearboxes often operate under fluctuating load conditions during service. Conventional techniques for monitoring vibration are based on the assumption that…”
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Online shaft encoder geometry compensation for arbitrary shaft speed profiles using Bayesian regression by Diamond, D.H., Heyns, P.S., Oberholster, A.J.

“…The measurement of instantaneous angular speed is being increasingly investigated for its use in a wide range of condition monitoring and prognostic…”
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Accuracy evaluation of sub-pixel structural vibration measurements through optical flow analysis of a video sequence by Diamond, D.H., Heyns, P.S., Oberholster, A.J.

“…•Optical flow accurately measured vibrations 450 times smaller than a pixel.•Optimal processing parameters must be chosen to obtain accurate results.•A…”
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