scholarly journals CALCULATION OF THROTTLEMENT PARAMETERS IN PARALLEL CHANNELS OF DRILLING PIPERS FOR DEEP HOLE

2021 ◽  
pp. 34-38
Author(s):  
E. A. Fedyanov ◽  
V. A. Saninsky ◽  
N. A. Ushakov
Keyword(s):  
Flow Rate ◽  
Outer Surface ◽  
Cutting Fluids ◽  
Deep Hole ◽  
Machined Surface ◽  
Pressure Flow ◽  
Parallel Flows ◽  
Working Medium ◽  
Axial Movement ◽  
Parallel Channels

The article presents a method for calculating the characteristics of the throttling elements of the lubricating-cooling technical medium (COTS) Yu used in deforming piercing. A feature of the proposed technique is the method of supplying cutting fluids under pressure through the grooves made on the outer surface of the mandrel teeth, when the pressure of the working medium and its flow rate are divided into parallel flows, one of which provides pressure on the piercing when the hole is mandrelled with a normalized speed in its axial movement the second provides the calculated parameters of throttling between the surface of the grooves on the mandrel teeth and the machined surface, where they create "damping cushions", improving the mandrel process and reducing wear of the piercing [3]. The presented calculation of the characteristics (coolant pressure, flow rate, etc.) with the location of the conditional chambers formed by the grooves of the punching teeth and the processed surface confirms the possibility of using throttles to implement the conditions for using throttling elements during cutting-deforming piercing of deep holes in long tube blanks and increasing by this basis of its effectiveness.

Pressure-Flow Characteristics During Peristaltic Transport of Non-Newtonian Fluid in Distensible Tube With Different Wave Forms

2003 ◽  
Author(s):  
Prasanna Hariharan ◽  
Rupak K. Banerjee
Keyword(s):  
Newtonian Fluid ◽  
Flow Rate ◽  
Flow Characteristics ◽  
Pressure Flow ◽  
Square Wave ◽  
Wall Movement ◽  
Power Law Fluids ◽  
Significant Difference ◽  
Wave Forms ◽  
Distensible Tube

This study analyzes the pressure-flow characteristics during the peristaltic pumping of power law fluids in an axi-symmetric non-uniform distensible tube. The analyzed geometry is of a diverging shape that is common in several biological flow conduits, especially in mammals. Using the Fourier series, the dimensionless wall coordinates for sinusoidal, triangular, trapezoidal, and square wave forms are obtained to simulate wall movement. Equations expressing the pressure-flow rate relationship for different wall shapes are developed from the wave equation. Pressure-flow and velocity plots are obtained by solving the equations numerically. The results indicate that there is significant difference in pressure-flow relationship between Newtonian and non-Newtonian fluid. Also, the maximum flow rate can be achieved when the wall movement follows a square wave form.

Evaluation of Cutting Fluid With Nanoinclusions

2013 ◽  
Vol 4 (3) ◽  
Author(s):  
M. Amrita ◽  
R. R. Srikant ◽  
A. V. Sitaramaraju
Keyword(s):  
Tool Wear ◽  
Regression Model ◽  
Flow Rate ◽  
Environmental Effects ◽  
Cutting Fluid ◽  
Cutting Fluids ◽  
Economic Aspects ◽  
Flow Rates ◽  
Optimum Cutting ◽  
Graphite Nanoparticles

Environmental and economic concerns on use of cutting fluids have led to use of minimum quantity cooling lubrication (MQCL) system, which uses minute quantity of cutting fluids, demanding a specialized fluid with improved properties. Investigation of any newly developed cutting fluid would be complete if it is evaluated with respect to its machinability, environmental and economic aspects. The present work investigates the viscosity, machinability characteristics, environmental effects, and economic aspects of a newly developed nanocutting fluid with varying concentrations of graphite nanoparticles applied at different flow rates to machining operation. It is found that the machinability improved with respect to conventional cutting fluid and this improvement increased with increase in concentration of nanoinclusions in the range 0.1–0.5 wt. % and also with increase in the flow rate. A regression model is developed for nanocutting fluids to estimate tool wear when used in the range 0.1–0.5 wt. % at flow rates 5 ml/min to 15 ml/min. The biodegradability is found to decrease with inclusion of nanoparticles due to the inorganic nature of selected nanoparticle. But its application as MQCL is ecofriendly as the nanocutting fluid is not disposed to the environment and graphite in it is neither toxic nor hazardous. Based on economic aspect, MQCL application with conventional cutting fluid and few cases of nanocutting fluids are found to be economic compared to flood lubrication. So a compromise has to be obtained between the economic and machinability aspects to choose an optimum cutting fluid.

Model-Based Evaluation of Eustachian Tube Mechanical Properties Using Continuous Pressure–Flow Rate Data

2002 ◽  
Vol 30 (8) ◽  
pp. 1064-1076 ◽  
Author(s):  
Samir N. Ghadiali ◽  
J. Douglas Swarts ◽  
William J. Federspiel
Keyword(s):  
Mechanical Properties ◽  
Eustachian Tube ◽  
Flow Rate ◽  
Rate Data ◽  
Pressure Flow ◽  
Model Based

Influence of pressure, flow rate, and pulsatility on release of 6-keto-PGF and thromboxane B in ex vivo[mdash ]perfused canine veins

1988 ◽  
Vol 7 (1) ◽  
pp. 99-107 ◽  
Author(s):  
Jan S. Brunkwall ◽  
James C. Stanley ◽  
Linda M. Graham ◽  
William E. Burkel
Keyword(s):  
Flow Rate ◽  
Ex Vivo ◽  
Pressure Flow
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