Predicting Hydraulic Valve Pressure Drop Using CFD

2005 ◽  
Author(s):  
Roger Yang
Keyword(s):  
Pressure Drop ◽  
Hydraulic Valve ◽  
Valve Pressure

scholarly journals Modeling and Experiments of an Annular Multi-Channel Magnetorheological Valve

Actuators ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 19
Author(s):  
Xiaolong Yang ◽  
Yingjie Chen ◽  
Yuting Liu ◽  
Ruibo Zhang
Keyword(s):  
Pressure Drop ◽  
Excitation Coil ◽  
Core Components ◽  
Ordinary Type ◽  
Modeling And Experiments ◽  
The Common ◽  
And Performance ◽  
Magnetorheological Valve ◽  
Hydraulic Valve ◽  
Valve Pressure

With the increasing number of cars, the demand for vehicle maintenance lifts is also increasing. The hydraulic valve is one of its core components, but there are problems with it such as inaccurate positioning and failure. In order to improve the service performance of vehicle maintenance elevators, a novel annular multi-channel magnetorheological (MR) valve structure was creatively proposed based on intelligent material MR fluid (MRF), and its magnetic circuit was designed. The influence of current, damping gap and coil turns on the pressure drop performance of the annular multi-channel MR valve was numerically studied and compared with ordinary type magnetorheological valve pressure drop performance through contrast and analysis. The influence of different loads and currents on the pressure drop performance of annular multi-channel magnetorheological valve was verified by experiments, and the reliability of numerical analysis results was verified. The results show that the single winding excitation coil is 321 to meet the demand. The pressure drop performance of the annular multi-channel magnetorheological valve is 5.6 times that of the ordinary magnetorheological valve. The load has little influence on the regulating range and performance of pressure drop of the MR valve. Compared with the common type, the pressure drop performance of the annular multi-channel MR Valve is improved by 3.7 times, which is basically consistent with the simulation results.

Aerodynamic Torque Acting on a Butterfly Valve. Comparison and Choice of a Torque Coefficient

1999 ◽  
Vol 121 (4) ◽  
pp. 914-917 ◽  
Author(s):  
C. Solliec ◽  
F. Danbon
Keyword(s):  
Pressure Drop ◽  
Static Pressure ◽  
Fluid Dynamic ◽  
Dynamic Pressure ◽  
Low Cost ◽  
Normalization Method ◽  
Pressure Drops ◽  
Torque Coefficient ◽  
Aerodynamic Torque ◽  
Valve Pressure

Most technological devices use butterfly valves to check the flow rate and speed, through piping. Their main advantages are their low cost, their mechanical suitability for fast operation, and their small pressure drops when they are fully open. The fluid dynamic torque about the axis of large valves has to be considered as the actuator could be overstrained. This torque is generally defined using a nondimensional coefficient KT, in which the static pressure drop created by the valve is used for normalization. When the valve is closed downstream of an elbow, the valve pressure drop is not well defined. Thus, the classic normalization method gives many ambiguities. To avoid the use of the pressure drop, we define another torque coefficient CT in which the dynamic pressure of the flow is the normalization factor instead of the pressure drop. Advantages and drawbacks of each normalization method are described in the following.

scholarly journals Appropriate Separator Sizing: A Modified Stewart and Arnold Method

2012 ◽  
Vol 2012 ◽  
pp. 1-4
Author(s):  
F. Boukadi ◽  
V. Singh ◽  
R. Trabelsi ◽  
F. Sebring ◽  
D. Allen ◽  
...  
Keyword(s):  
Pressure Drop ◽  
History Matching ◽  
Oil And Gas ◽  
Slenderness Ratio ◽  
Petroleum Industry ◽  
Production Equipment ◽  
Time Model ◽  
Initial Flow ◽  
Flow Rates ◽  
Valve Pressure

Oil and gas separators were one of the first pieces of production equipment to be used in the petroleum industry. The different stages of separation are completed using the following three principles: gravity, centrifugal force, and impingement. The sizes of the oil droplets, in the production water, are based mainly on the choke valve pressure drop. The choke valve pressure drop creates a shearing effect; this reduces the ability of the droplets to combine. One of the goals of oil separation is to reduce the shearing effect of the choke. Separators are conventionally designed based on initial flow rates; as a result, the separator is no longer able to accommodate totality of produced fluids. Changing fluid flow rates as well as emulsion viscosity effect separator design. The reduction in vessel performance results in recorded measurements that do not match actual production levels inducing doubt into any history matching process and distorting reservoir management programs. In this paper, the new model takes into account flow rates and emulsion viscosity. The generated vessel length, vessel diameter, and slenderness ratio monographs are used to select appropriate separator size based on required retention time. Model results are compared to API 12J standards.

Development of a Position Controlled Digital Hydraulic Valve

2015 ◽  
Author(s):  
N. P. Sell ◽  
N. Johnston ◽  
A. R. Plummer ◽  
S. Kudzma
Keyword(s):  
Pressure Drop ◽  
Position Control ◽  
Hybrid Control ◽  
The Other ◽  
Modern World ◽  
Empirical Testing ◽  
High Frequencies ◽  
Control Approach ◽  
High Flows ◽  
Hydraulic Valve

Digital hydraulics is a key part of the continuing applicability of fluid power in the modern world. In order to realize the potential of digital hydraulic circuits, valves which are able to switch at high frequencies whilst retaining high flows are first required. This paper details the development of a valve which is capable of switching in 0.5ms whilst providing a flow rate of over 50L/min at a 10bar pressure drop. Unlike most of the other valves currently in development, position control is used as opposed to the more common bang-bang actuation. This has obvious benefits for valve robustness and offers the possibility of a hybrid control approach which utilizes both throttling and switching control. This paper will detail the design and empirical testing of the valve and benchmark it against published and commercial valves before proceeding to discuss the challenges present in developing the valve further.

The Analysis Pressure Drop between Initial Station and 1#valve when Lan-Zheng-Chang Product Pipeline Shutdown

2014 ◽  
Vol 628 ◽  
pp. 142-145
Author(s):  
Yu Lei Xu
Keyword(s):  
Pressure Drop ◽  
Volume Expansion ◽  
Temperature Drop ◽  
New Product ◽  
Oil Pipeline ◽  
Pressure Pipeline ◽  
Early Fall ◽  
Temperature And Pressure ◽  
Product Pipeline ◽  
Valve Pressure

Considering the product oil has volume compressibility and volume expansion in different temperature and pressure, calculate the LAN-Zheng- Chang product pipeline in the shutdown during the initial station and 1#valve pressure drop rate, combined with the first station in Lanzhou reservoir area of the oil temperature oil temperature drop analysis is the first station in the main reason of pressure pipeline shutdown early fall, and provides technical support for the other new product oil pipeline.

PREDICTION OF PRESSURE DROP THROUGH BAFFLE INJECTOR

2014 ◽  
Vol 24 (3) ◽  
pp. 273-280
Author(s):  
Kyubok Ahn ◽  
Hwan-Seok Choi
Keyword(s):  
Pressure Drop
Sign in / Sign up

Export Citation Format

Share Document