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105 results for “hydraulic”
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Research ArticleOpen accessEvery word in the titleModeling and Controller Design of an Electro-Hydraulic Actuator SystemM. F. Rahmat, S. Md. Rozali, N. Abdul Wahab et al.Problem statement: Electro-hydraulic actuators are widely used in motion control application. Its valve needs to be controlled to determine direction of the motion. Mathematical modeling is a description of a system in terms of equations. It can be divided into two parts; physical modeling and system identification. The objective of this study was to obtain mathematical model of an electro-hydraulic … …American Journal of Applied Sciences, Vol. 7, Issue 8 · 31 Aug 2010 · 11,187 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePneumatic and Hydraulic Systems in Coal Fluidized Bed CombustorZ. O. Opafunso, I. I. Ozigis, I. A. AdetundeProblem statement: This study designed the pneumatic and hydraulic systems in coal fluidized bed combustor. These are fluidization of silica sand bed material, Air distributor, centrifugal fan, electric motor power drive and surface heat exchanger. Approach: The effects of increased gas velocity on silica sand and the resultant drag force formed the basic equations in fluidization. Air distributor was introduced … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 1 · 31 Mar 2009 · 7,722 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEvaluation of Environmental and Hydraulic Performance of Bio-Composite Revetment BlocksThamer A. Mohamed, Nor A. Alias, Abdul H. Ghazali, Mohd. S. JaafarIt is necessary to develop a concrete revetment block which can cater for environment and at the same time it will be effective in protecting river banks (stabilize the slope of banks) from scouring during flood. In the present study, the environmental and hydraulic performance of the proposed revetment block was evaluated through laboratory and field tests. The tested revetment … …American Journal of Environmental Sciences, Vol. 2, Issue 4 · 31 Dec 2006 · 6,969 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleConservation of “Partial Vorticity” with Application on Hydraulic JumpsHarald NaeserIn two preceding works, the idea of partial conservation theorems was introduced and conservation equations for partial energy and partial angular momentum were established. A similar conservation theorem for partial vorticity of incompressible fluids is established here. The vorticity vector is divided into two elements (both denoted “partial vorticity”) and their conservation equations established separately. They show that, in addition … …American Journal of Applied Sciences, Vol. 2, Issue 8 · 31 Aug 2005 · 6,707 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleBy-pass Devices as Effective Means of Protection from the Hydraulic HammerKhalid S. Al-RababaSwitching-off the parallel working pump units causes sudden discharge changes in parallel pipe lines, as a result of that hydraulic shocks takes place. The damping of these shocks can be achieved by the installation of the by-pass devices between the parallel lines of the piping system. The analytical calculations demonstrate that the reduction in hydraulic shocks reaches 40% and considerable … …American Journal of Applied Sciences, Vol. 2, Issue 2 · 28 Feb 2005 · 6,918 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSome Aspects of the Human Body’s HydraulicsRelly Victoria Virgil Petrescu, Raffaella Aversa, Antonio Apicella, Florian Ion Tiberiu PetrescuThis paper presents some aspects related to the human body’s hydraulics in the desire to make readers aware of how to maintain all the blood vessels of the human body in order to maintain the entire healthy, functional, young, vigorous circulatory system for a while the longest possible. The problem is complex because it has to be viewed from all … …OnLine Journal of Biological Sciences, Vol. 19, Issue 3 · 9 Aug 2019 · 7,180 accessesView PDFCite
Review ArticleOpen accessEvery word in the titleSoil Hydraulic Conductivity and Soil Water Retention of Inland Peat on Various Land Covers (Case Study: Natural Peat and Burnt Peat)Fengky Florante Adji et al.This research aims to examine differences in the rate of saturated soil hydraulic conductivity (permeability) and unsaturated soil hydraulic conductivity (infiltration) and soil water retention with various pressures in peatland with different land covers. The study was conducted from June to October 2021. The research was conducted at the LAHG-Sebangau and at the KHDTK-Tumbang Nusa, central Kalimantan, Indonesia. Based on … …OnLine Journal of Biological Sciences, Vol. 23, Issue 3 · 19 May 2023 · 6,128 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleExperimental Validation of a Mathematical Model of the Operation of a Hydraulic Ram Pump with a Springs SystemAndriamahefasoa Rajaonison, Hery Tiana RakotondramiaranaWater pumps, which usually require fuels or power, are for carrying water from water sources to a facility, generally a household or a farm in the countryside. The present study consists of conducting an experimental validation of a mathematical model that was developed in a previous work for simulating the functioning of a new form of the hydraulic ram pump, … …American Journal of Applied Sciences, Vol. 17, Issue 1 · 14 Jun 2020 · 7,705 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleHydraulic Flow through Engineering Bentonite-Based Containment BarriersEric Wooi Kee Loh, Devapriya Chitral WijeyesekeraThis paper presents the use of software modelling as a tool to study the impact of hydraulic "resistivity" on the contaminant transport through bentonite-based containment barriers. A sensitivity analysis on the predicted data was carried out by varying the boundary conditions as well as the hydraulic resistance to flow through varying contaminant transport parameters. Accordingly, both advective and diffusive flow … …American Journal of Applied Sciences, Vol. 12, Issue 11 · 4 Nov 2015 · 6,709 accessesView PDFCite