Closure to “Comparative Analysis of Hydraulic Calculation Methods in Design of Microirrigation Laterals” by Gürol Yildirim and Necati Ağiralioğlu

2006 ◽  
Vol 132 (1) ◽  
pp. 85-88 ◽  
Author(s):  
Gürol Yıldırım ◽  
Necati Ağiralioğlu
Keyword(s):  
Comparative Analysis ◽  
Hydraulic Calculation ◽  
Calculation Methods

COMPARATIVE ANALYSIS OF EQUILIBRIUM BEACH PROFILE CALCULATION METHODS

2015 ◽  
pp. 39
Author(s):  
A. L. Khomchanovsky ◽  
E. A. Fedorova ◽  
An. A. Lygin ◽  
A. Sh. Khabidov
Keyword(s):  
Comparative Analysis ◽  
Calculation Methods ◽  
Beach Profile ◽  
Equilibrium Beach Profile

scholarly journals Thermodynamic properties of 5-(2-nitrophenyl) furan-2-carbaldehyde and it’s derivatives in a condensed state

2020 ◽  
Vol 3 (2) ◽  
pp. 1-6
Author(s):  
I. B. Sobechko ◽  
◽  
Yu. I. Gorak ◽  
V. M. Dibrivnyi ◽  
L. V. Goshko ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Thermodynamic Properties ◽  
Condensed State ◽  
Calculation Methods ◽  
Combustion Calorimeter

Using the precision bomb combustion calorimeter B-08-MA, the combustion energies of 5- (2- nitrophenyl) -furan-2-carbaldehyde, 5- (2-nitro-4-methylphenyl) -furan-2-carbaldehyde and 5- ( 2-nitro-4- oxymethylphenyl) -furan-2-carbaldehyde. Based on the obtained data, the values of enthalpies of combustion and formation of substances in the condensed state are calculated. A comparative analysis of experimentally determined values with theoretically calculated values by additive calculation methods is given.

scholarly journals Determining efficiency of cycloid reducers using different calculation methods

2019 ◽  
Vol 290 ◽  
pp. 01008
Author(s):  
Milos Matejic ◽  
Mirko Blagojevic ◽  
Ileana Ioana Cofaru ◽  
Nenad Kostic ◽  
Nenad Petrovic ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Analytical Methods ◽  
Common Property ◽  
Experimental Results ◽  
Calculation Methods ◽  
Wide Range ◽  
Pros And Cons ◽  
Gear Trains ◽  
Central Gear ◽  
The Way

Cycloid reducers are gear trains which can be classified as planetary transmissions. These transmissions have a very wide range of uses in industry in transporters, robots, satellites, etc. This research presents a comparative analysis of three analytical methods for determining cycloid drive efficiency. The paper explores every mathematically formulated method and compares them to experimental results from literature. The presented methods for determining efficiency have a common property, in that they all determine losses due to friction on the bearing cam surface of the shaft, the rollers of the central gear and the output rollers. The calculation of efficiency values is done for standard power values. The methods differ primarily in the way they calculate losses. For each method of calculating efficiency there is an analysis of pros and cons. The paper concludes with suggestions as well as possible directions for further research.

A comparative analysis of the calculation methods of the heat emission during heating water with underheating

2014 ◽  
Vol 61 (3) ◽  
pp. 203-209
Author(s):  
O. E. Stepanov ◽  
V. E. Karnaukhov ◽  
A. M. Khudyakov ◽  
Yu. N. Eikhorn ◽  
A. V. Bulanov ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Heat Emission ◽  
Calculation Methods ◽  
Heating Water

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.

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.

Study on Improving the Empirical Formula of Calculating Francis Turbine’s Axial Hydro-Thrust

2015 ◽  
Vol 733 ◽  
pp. 619-622
Author(s):  
Xi Zhao ◽  
Li Zhu
Keyword(s):  
Comparative Analysis ◽  
Working Conditions ◽  
Empirical Formula ◽  
Hydropower Station ◽  
Calculation Methods ◽  
Operational Parameters ◽  
Flow Head

This paper improved the empirical formula so that it can calculate the axial hydro-thrust under different working conditions. Then based on the operational parameters of a hydropower station, two calculation methods were used to calculate axial hydro-thrust and made comparative analysis. The results show that the improved formula is simple in computation and closely combined with parameters like flow, head and speed, and its calculation accuracy satisfies the engineering demand.

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