The Adaptive Damping Technique: Improving the Simulation Accuracy of Hydraulic Transients

Hydraulic surges are transient events frequently observed in various industrial and laboratory flow situations. Understanding surge physics and its accurate numerical prediction is crucial to the safety of flow systems. The maximum accuracy achievable for transient surge simulations is limited by t...

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Autores principales:	Jishnu Chandran R., A. Salih
Formato:	article
Lenguaje:	EN
Publicado:	International Journal of Mathematical, Engineering and Management Sciences 2021
Materias:	adaptive damping hydraulic transient surge modelling unsteady friction variable damping coefficient Technology T Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/740bdad8206340c0a058328e10a09954
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spelling	oai:doaj.org-article:740bdad8206340c0a058328e10a099542021-12-03T17:21:57ZThe Adaptive Damping Technique: Improving the Simulation Accuracy of Hydraulic Transients10.33889/IJMEMS.2021.6.6.0922455-7749https://doaj.org/article/740bdad8206340c0a058328e10a099542021-12-01T00:00:00Zhttps://ijmems.in/cms/storage/app/public/uploads/volumes/92-IJMEMS-21-0126-6-6-1553-1564-2021.pdfhttps://doaj.org/toc/2455-7749Hydraulic surges are transient events frequently observed in various industrial and laboratory flow situations. Understanding surge physics and its accurate numerical prediction is crucial to the safety of flow systems. The maximum accuracy achievable for transient surge simulations is limited by the inefficiencies in the mathematical models used. In this work, we propose a mathematical model that incorporates an adaptive damping technique for the accurate prediction of hydraulic surges. This model also takes the compressibility effects in the liquid during the surge process into account. The novel approach of using the local pressure fluctuation data from the flow to adjust the unsteady friction for controlling the dissipation is introduced in this paper. The adaptive-dissipation is actualized through a unique 'variable pressure wave damping coefficient' function definition. Numerical simulation of three different valve-induced surge experiments demonstrates the reliability and robustness of the mathematical model. Numerical results from the proposed model show an excellent match with the experimental data by closely reproducing both the frequency and the amplitude of transient pressure oscillations. A comparative study explains the improvement in the simulation accuracy achieved by replacing the constant damping coefficient with the proposed variable coefficient. The superiority of the new model with the adaptive damping capability over the similar models in literature and those used in commercial software packages is also well established through this study.Jishnu Chandran R.A. SalihInternational Journal of Mathematical, Engineering and Management Sciencesarticleadaptive dampinghydraulic transientsurge modellingunsteady frictionvariable damping coefficientTechnologyTMathematicsQA1-939ENInternational Journal of Mathematical, Engineering and Management Sciences, Vol 6, Iss 6, Pp 1553-1564 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adaptive damping hydraulic transient surge modelling unsteady friction variable damping coefficient Technology T Mathematics QA1-939
spellingShingle	adaptive damping hydraulic transient surge modelling unsteady friction variable damping coefficient Technology T Mathematics QA1-939 Jishnu Chandran R. A. Salih The Adaptive Damping Technique: Improving the Simulation Accuracy of Hydraulic Transients
description	Hydraulic surges are transient events frequently observed in various industrial and laboratory flow situations. Understanding surge physics and its accurate numerical prediction is crucial to the safety of flow systems. The maximum accuracy achievable for transient surge simulations is limited by the inefficiencies in the mathematical models used. In this work, we propose a mathematical model that incorporates an adaptive damping technique for the accurate prediction of hydraulic surges. This model also takes the compressibility effects in the liquid during the surge process into account. The novel approach of using the local pressure fluctuation data from the flow to adjust the unsteady friction for controlling the dissipation is introduced in this paper. The adaptive-dissipation is actualized through a unique 'variable pressure wave damping coefficient' function definition. Numerical simulation of three different valve-induced surge experiments demonstrates the reliability and robustness of the mathematical model. Numerical results from the proposed model show an excellent match with the experimental data by closely reproducing both the frequency and the amplitude of transient pressure oscillations. A comparative study explains the improvement in the simulation accuracy achieved by replacing the constant damping coefficient with the proposed variable coefficient. The superiority of the new model with the adaptive damping capability over the similar models in literature and those used in commercial software packages is also well established through this study.
format	article
author	Jishnu Chandran R. A. Salih
author_facet	Jishnu Chandran R. A. Salih
author_sort	Jishnu Chandran R.
title	The Adaptive Damping Technique: Improving the Simulation Accuracy of Hydraulic Transients
title_short	The Adaptive Damping Technique: Improving the Simulation Accuracy of Hydraulic Transients
title_full	The Adaptive Damping Technique: Improving the Simulation Accuracy of Hydraulic Transients
title_fullStr	The Adaptive Damping Technique: Improving the Simulation Accuracy of Hydraulic Transients
title_full_unstemmed	The Adaptive Damping Technique: Improving the Simulation Accuracy of Hydraulic Transients
title_sort	adaptive damping technique: improving the simulation accuracy of hydraulic transients
publisher	International Journal of Mathematical, Engineering and Management Sciences
publishDate	2021
url	https://doaj.org/article/740bdad8206340c0a058328e10a09954
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The Adaptive Damping Technique: Improving the Simulation Accuracy of Hydraulic Transients

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