نتایج جستجو برای: hydraulic coefficient
تعداد نتایج: 196741 فیلتر نتایج به سال:
The urgency of the paper is determined by necessity to predict results tests for determining coefficient hydraulic resistance axially symmetrical check valve DN 100-600 with operating pressure up 20 MPa and temperature from plus 50C 3500C according TS 6981-254-08847871-07. This suggests reduce volume excluding intermediate samples valves (DN 100, DN125, 200, 300, 500, 600) situated in between t...
Hybrid electric vehicles employ a hydraulic braking system and a regenerative braking system together to provide enhanced braking performance and energy regeneration. In this paper an integrated braking system is proposed for an electric hybrid vehicle that include a hydraulic braking system and a regenerative braking system which is functionally connected to an electric traction motor. In the ...
With the advent of advanced geographical informational systems (GIS) and remote sensing technologies in recent years, topographic (elevation, slope, and aspect) and vegetation attributes are routinely available from digital elevation models (DEMs) and normalized difference vegetation index (NDVI) at different spatial (watershed, regional) scales. This study explores the use of topographic and v...
This paper presents the results of a numerical simulation to determine hydraulic resistance for transverse flow through bundle hexagonal rods. The calculations were carried out using precision CFD code CONV-3D, intended direct an incompressible fluid (DNS-approximation) in parts fast reactors cooled by liquid metal. obtained dependencies pressure drop and coefficient anisotropy friction on Reyn...
Saturated hydraulic conductivity (Kfs) and macroscopic capillary length of soil pores are important hydraulic properties for water flow and solute transport modeling. Measuring these parameters is tedious, time consuming and expensive. One way is using indirect methods such as Pedotransfer functions (PTFs). The objective of this research was to develop some PTFs for estimating saturated hydraul...
The drops are used to control the descents, stabilize the bed level, and control the upstream water level in sloping channels with less slope than the ground slope. The current study presents a numerical analysis of hydraulic characteristics in the vertical drop using computational fluid dynamics. At first, the laboratory models were used for verification and choosing the best model of turbule...
Drip irrigation is a new method of irrigation that is rapidly growing in different countries. The emitters are the most important parts of a drip irrigation system. Many factors such as physical, chemical and biological clogging, pressure, water temperature affect the emitter´s uniformity of water emission. In this study, to investigate pressure effect on the hydraulic performance of emitters, ...
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