Design and Fabrication of Pressure-Compensating Compliant Tubes
نویسنده
چکیده
Different fabrication methods are evaluated for producing pressure-compensating tubes for use in low-pressure drip irrigation systems. Such devices would allow drip irrigation systems to operate at driving pressures much lower than those required by current available technology, allowing for cost and water savings in developing nations. Fabrication methods explored consist mainly of molding of liquid silicone rubber and production from existing silicone stock by folding or binding multiple sheets of material together. Based on small-scale production and testing, the sheet fabrication method showed some promise of equaling the performance of the injection-molded tubes, but both methods require further refinement going forward. Thesis Supervisor: Amos G. Winter, V Title: Noyce Career Development Assistant Professor
منابع مشابه
Sensitivity analysis of the effective nanofluid parameters flowing in flat tubes using the EFAST method
In the present study, the effective parameters of water-Al2O3 nanofluid flowing in flat tubes are investigated using the EFAST Sensitivity Analysis (SA) method. The SA is performed using GMDH type artificial neural networks (ANN) which are based on validated numerical data of two phase modeling of nanofluid flow in flat tubes. There are five design variables namely: tube flattening (H), flow ra...
متن کاملDesign and Fabrication of Plasma Array Antenna with Beam Forming
In this paper, the design and implementation of plasma antenna array with beam forming is discussed. The structure consists of a circular array of plasma tube enclosed in a unipolar UHF band monopole antenna. Beam forming is possible by stimulated plasma tubes. The combination of the above antenna with plasma excitation controller makes a beam forming smart antenna. An experimental model in UHF...
متن کاملDesign and analysis of orthogonally compliant features for local contact pressure relief in transtibial prostheses.
A very attractive advantage of manufacturing prosthetic sockets using solid freeform fabrication is the freedom to introduce design solutions that would be difficult to implement using traditional manufacturing techniques. Such is the case with compliant features embedded in amputee prosthetic sockets to relieve contact pressure at the residual limb-socket interface. The purpose of this study w...
متن کاملWall stiffness suppresses Akt/eNOS and cytoprotection in pulse-perfused endothelium.
Increased steady shear stress stimulates nitric oxide synthase (eNOS) in part by Akt-dependent phosphorylation. Arteries in vivo are exposed to pulse perfusion (PP) combining phasic shear with stretch. In compliant vessels, enhancing PP lowers vascular tone by stimulating eNOS; whereas in aged, stiff arteries, flow-mediated dilation declines and PP is a prominent risk factor. Here, we tested th...
متن کاملMulti-Objective Optimization of Tio2-Water Nanofluid Flow in Tubes Fitted With Multiple Twisted Tape Inserts in Different Arrangement
In this paper, experimentally derived correlations of heat transfer and pressure drop are used in a Pareto based Multi-Objective Optimization (MOO) approach to find the best possible combinations of heat transfer and pressure drop of TiO2-water nanofluid flow in tubes fitted with multiple twisted tape inserts in different arrangement. In this study there are four independent design variables: t...
متن کامل