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.

Study on Drifting Drilling Assembly and Casing String’s Stiffness Ratio

2011 ◽  
Vol 339 ◽  
pp. 583-589
Author(s):  
Xiao Dong Zhang ◽  
Ru Yi Gou ◽  
Hong Jun Liang ◽  
Yan Gong ◽  
Ping Xiao
Keyword(s):  
Computer Program ◽  
Calculation Method ◽  
Focal Point ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Stiffness Ratio ◽  
Conservation Of Energy ◽  
Assembly Design ◽  
Ratio Calculation ◽  
Deep Well

Drilling technology of ultra-deep well is still the focal point of drilling research, there are many difficulties in ultra-deep well drilling, such as bottom hole with high temperature and high pressure, complex geology, borehole with sharp dogleg, etc. These technical difficulties put forward higher request in casing running, well quality must be controlled strictly in order to run larger diameter combination casing string successfully. Well quality is closely linked with the drifting drilling assembly design. The accurate stiffness ratio calculation is the key prerequisite of drifting drilling assembly design. In this paper, a new mechanical model is applied to simulate deflection of the drifting drilling assembly. The solution of variable cross-section beam’s equivalent stiffness is applied to solve the stiffness of the drifting drilling assembly. Modified stiffness ratio calculation method for drifting drilling assembly and casing string is proposed. In the process of calculation formula derivation, the conservation of energy law has been used multiple times. At last, the VB computer program is compiled, which contains the modified calculation method. The computer program calculation value is larger than the conventional method’s calculation value. Modified calculation method is more reasonable, which has important significance for drifting drilling assembly optimal design.

Calculation of Interaction Force between Pipe and Water of HVAC

2014 ◽  
Vol 1046 ◽  
pp. 165-168
Author(s):  
Zhi Bin Luo
Keyword(s):  
Interaction Force ◽  
Linearization Method ◽  
Hydraulic Calculation ◽  
Pipe Network ◽  
The Finite Element Method ◽  
Calculation Methods ◽  
Iterative Calculation ◽  
Network Utilization ◽  
Storage Node ◽  
And Storage

On the basis of the pipe network hydraulic calculation of basic theory, the pipe network utilization, using graph theory and peak array build relationships and storage node and pipe sections between the pipeline node associated with the hydraulic parameters of pipe sections linked together establish a common heating pipe network hydraulic calculation models. Matrix for the model were derived solving ideas based on the finite element method and linearization method for existing node equation method to improve to get a new heating network hydraulic calculation methods common to construct a new iterative calculation equation, to improve the convergence of iterative calculation.

The Hydraulic Calculation and Reformation Application of Yuhua Heating Network in Shijiazhuang Based on Graph Theory

2011 ◽  
Vol 374-377 ◽  
pp. 606-609
Author(s):  
Jian Jun Hu ◽  
Hua Yang ◽  
Chun Hua Sun ◽  
Cheng Ying Qi ◽  
Guo Qiang Xia
Keyword(s):  
Graph Theory ◽  
Hydraulic Calculation ◽  
Pipe Network ◽  
Study Test ◽  
Actual Operation ◽  
Security And Reliability ◽  
Uneven Heating ◽  
Annular Pipe ◽  
Investigation And Study ◽  
Source Ability

In heat source ability sufficient situation, Yuhua network in Shijiazhuang had some phenomenon, such as uneven heating, serious disorders, the far-end heating reliability was insufficient. Based on the basic principle of Graph theory, this article carried on the detailed hydraulic calculation to the annular pipe network, determined and implemented the reasonable transformation program, finally carried on the investigation and study test to the actual operation network after reformation. The results show that after reformation, the actual heating network runs well, improves the heating security and reliability, so the hydraulic calculation method based on Graph theory is accurate, and has certain guiding sense to other pipe networks' energy conservation reformation.

Use of a Calculation Method for X-Ray Emission Analysis

1969 ◽  
Vol 23 (4) ◽  
pp. 346-348 ◽  
Author(s):  
A. Batt
Keyword(s):  
Computer Program ◽  
Calculation Method ◽  
Applied Research ◽  
Spectrochemical Analysis ◽  
Parameter Method ◽  
Fundamental Parameter ◽  
Emission Analysis ◽  
Basic Approach ◽  
X Ray ◽  
Fundamental Parameter Method

The use of a fundamental parameter method for effecting matrix corrections in quantitative x-ray spectrochemical analysis is described. A versatile computer program calculates composition directly from measured intensities. Variations in the basic approach are employed in the analysis of a series of sulfide and oxide samples. The Applied Research Laboratories multi-channel x-ray quantometer (MXQ) is briefly described.

An Axial Flow Compressor for Operation With Humid Air and Water Injection

2011 ◽  
Vol 133 (7) ◽  
Author(s):  
Jesuino Takachi Tomita ◽  
Luciano Porto Bontempo ◽  
João Roberto Barbosa
Keyword(s):  
Computer Program ◽  
Water Injection ◽  
Axial Flow ◽  
Operating Conditions ◽  
Axial Position ◽  
Design Stage ◽  
Viscous Effects ◽  
Humid Air ◽  
Axial Flow Compressor ◽  
Flow Compressor

The first steps of the turbomachinery design usually rely on numerical tools based on inviscid formulation with corrections using loss models to account for viscous effects, secondary flows, tip clearances, and shock waves. The viscous effects are accounted for using semi-empirical correlations especially assembled for the chosen airfoils and range of operating conditions. Fast convergence and good accuracy are required from such design procedures. There are successful models that produce very accurate performance prediction. Among the methodologies commonly used, the streamline curvature (SLC) is used since those characteristics and the most important properties can be calculated reasonably well at any radial positions, assisting other more complex analysis programs. The SLC technique is, therefore, well suited for the design of axial flow compressors for reasons such as quick access to vital flow properties at the blade edges from which actions may be taken to improve its performance at the design stage. This work reports the association of a SLC computer program and commercial software for comparison purposes, as well as for grid generation required by a full 3D, turbulent Navier–Stokes computer program used for flow calculation in the blade passages. Application to a high performance three-stage axial flow compressor with inlet guide vane demonstrates the methodology adopted. The SLC program is also capable of calculating the compressor performance with humid air and water injection at any axial position along the compressor. The influence of water injection at different axial positions, water particle diameter, and temperature of water particles were studied for different humid air conditions. The positions of the evaporating water particles were calculated using their thermophysical and dynamic properties along the compressor.

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.

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