A comprehensive hydraulic calculation method of non-newtonian fluids used four-parameter model

2013 ◽  
Keyword(s):  
Calculation Method ◽  
Newtonian Fluids ◽  
Hydraulic Calculation

Hydraulic Calculation Method Study of Branch Shape Water-Injection Pipe Network Based on Binary Tree

2011 ◽  
Vol 317-319 ◽  
pp. 2266-2270
Author(s):  
Li Xin Wei ◽  
Jiang Bo Wen ◽  
Lu Ying Zhang ◽  
Yan Chun Xu ◽  
Peng Li
Keyword(s):  
Computer Program ◽  
Calculation Method ◽  
Binary Tree ◽  
Water Injection ◽  
Hydraulic Calculation ◽  
Pipe Network ◽  
Structure Characteristics

On the basis of analyzing process and structure characteristics of branch shape water-injection pipe network, this paper established a hydraulic calculation method of branch shape water-injection pipe network based on binary tree. This method has many advantages, such as calculation speed is fast, occupying less memory, having high calculation accuracy, and so on. According to it, this paper compiled a computer program and presented an actual example.

scholarly journals The problem of hydraulic calculation of pressure distribution pipelines

2021 ◽  
Vol 6 (7 (114)) ◽  
Author(s):  
Volodymyr Cherniuk ◽  
Roman Hnativ ◽  
Oleksandr Kravchuk ◽  
Vadym Orel ◽  
Iryna Bihun ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
Flow Rate ◽  
Calculation Method ◽  
Fluid Motion ◽  
Hydraulic Calculation ◽  
Calculation Methods ◽  
Production Technologies ◽  
The Right ◽  
Longitudinal Slot ◽  
Resistance Coefficients

Most production technologies require a uniform flow path of liquid from pressure distribution pipelines. To achieve this goal, it is proposed to introduce polymer additives into the liquid flow or to use converging distribution pipelines with a continuous longitudinal slot in the wall. To reduce the uneven operation of the distribution pipeline during discrete liquid dispensing, it is proposed to use cylindrical output rotary nozzles with a lateral orthogonal entry of the jet into the nozzle. The problem is the lack of methods for accurate hydraulic calculation of the operation of distribution pipelines. Adequate calculation methods are based on differential equations. Finding the exact solution of the differential equation of fluid motion with variable path flow rate for perforated distribution pipelines is urgent, because it still does not exist. The available calculation methods take into account only the right angles of separation of the jets from the flow in the distribution pipeline. These methods are based on the assumption that the coefficient of hydraulic friction and the coefficient of resistance of the outlets are constant along the flow. A calculation method is proposed that takes into account the change in the values of these resistance coefficients along the distribution pipeline. The kinematic and physical characteristics of the flow outside the distribution pipeline are also taken into account. The accuracy of calculating the value of the flow rate of water distributed from the distribution pipeline has been experimentally verified. The error in calculating the water consumption by the method assuming that the values of the resistance coefficients are unchanged along the distribution pipeline reaches 18.75 %. According to the proposed calculation method, this error does not exceed 6.25 %. However, both methods are suitable for the design of pressure distribution pipelines, provided that the jet separation angles are straight. Taking into account the change from 90° to 360° of the angle of separation of the jets from the flow in the distribution pipeline will expand the scope and accuracy of calculation methods.

Discussion of Hydraulic Calculation Methods for Hot Water Heating Direct Return System

2013 ◽  
Vol 353-356 ◽  
pp. 3049-3053
Author(s):  
Yong Zheng Fu ◽  
Yao Xiong ◽  
Hui Hui Liu
Keyword(s):  
Engineering Design ◽  
Constant Temperature ◽  
Calculation Method ◽  
Temperature Drop ◽  
Hot Water ◽  
Hydraulic Calculation ◽  
Calculation Methods ◽  
Water Heating ◽  
The Common ◽  
Hydraulic Balance

For hot water heating direct return system, the common hydraulic calculation method in engineering design is constant temperature drop method,which is calculated from the farthest riser loop. Due to the limit of the minimum pipe size, the method is usually difficult to achieve the hydraulic balance for every riser loop, and it needs the utilization of valves to meet the need. In this paper, through a calculation example, it has explained that every riser loop is very easy to achieve hydraulic balance without the utilization of valves when the system is calculated from the nearest riser loop. Besides, the calculation order of this method has been given.

scholarly journals A thermal hydraulic calculation method of an intermediate heat exchanger of a loop type FBR

2015 ◽  
Vol 52 (11) ◽  
pp. 1436-1447 ◽  
Author(s):  
Hiroyasu Mochizuki ◽  
Kiyoyuki Hirai ◽  
Akira Okamoto ◽  
Masahito Takano
Keyword(s):  
Heat Exchanger ◽  
Calculation Method ◽  
Hydraulic Calculation ◽  
Intermediate Heat Exchanger

Back-Calculation Method of Subgrade Modulus Based on Traffic Speed Deflectometer

CICTP 2020 ◽  
2020 ◽  
Author(s):  
Guoshuai Zang ◽  
Haizhu Lu ◽  
Guanglai Jin ◽  
Zhixiang Zhang
Keyword(s):  
Calculation Method ◽  
Back Calculation ◽  
Subgrade Modulus ◽  
Traffic Speed

MODELING THE HYDRAULIC CHARACTERISTICS OF DRAIN VALVE AND BURST FITTING OF AN AIRCRAFT ACCIDENT-RESISTANT FUEL SYSTEM

2020 ◽  
Vol 7 (3) ◽  
pp. 37-44
Author(s):  
KONSTANTIN NAPREENKO ◽  
◽  
ROMAN SAVELEV ◽  
ALEKSEY TROFIMOV ◽  
ANNA LAMTYUGINA ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Hydraulic Resistance ◽  
Hydraulic Calculation ◽  
Fuel System ◽  
Hydraulic Characteristics ◽  
System A ◽  
Ansys Cfx ◽  
Calculation Results ◽  
Scale Experiment ◽  
Aircraft Accident

The article discusses methods for determining the hydraulic resistance of units of an accident-resistant fuel system. A detailed description of the need to create such fuel systems for modern helicopters is given. The development of such systems today is impossible without the use of the method of mathematical modeling, which allows to qualitatively solve problems arising in the design process. To obtain accurate research results, it is necessary to have a complete description of all elements and assemblies of the system. Methods for determining the hydraulic characteristics of AFS elements using the drag coefficient, reference literature and CFD codes are considered. As the investigated AFS units, a drain valve and burst fitting were studied in the article. A hydraulic calculation of these AFS elements ware performed, the simulation results are presented in the ANSYS CFX software package. Also as the calculation results of bursting fitting, the pressure distribution fields of full and static pressure, velocity and streamlines are also shown. An experimental setup for validating the results obtained using the mathematical modeling method is considered, as well as a methodology for conducting a full-scale experiment to determine the hydraulic resistance of the unit. Materials have been prepared for inclusion in a one-dimensional mathematical model of an accident-resistant fuel system.

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