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Terminated in academic year 2013/2014

Fluid Properties

Type of study Bachelor
Language of instruction Czech
Code 338-0319/01
Abbreviation VlaTe
Course title Fluid Properties
Credits 3
Coordinating department Department of Hydromechanics and Hydraulic Equipment
Course coordinator Ing. Lukáš Dvořák, Ph.D.

Subject syllabus

Lectures:
1) Division of fluids. Physical properties of fluids - density, viscosity and its dependence on temperature, viscosity, fluid compressibility.
2) The physical properties of liquids - specific heat capacity, thermal expansion, pour point. Chemical properties of liquids - flammability, flash point, corrosivity, chemical effects on elastomers, acid number.
3) Operational properties of fluids - lubricity, thermo-oxidative stability, the influence of air in the liquid, cavitation, foaming, de-emulsification properties
4) Characteristics and parameters of compressed air - pressure, flow, density, viscosity, compressibility, differences in calculations and measurements of hydraulic and pneumatic mechanisms
5) The rheological properties of liquids - the basics of rheology, rheogram Newtonian fluids, plasticity, dilation, thixotropy, reopexie, rheological models, rheometry
6) Mineral oil - types, signs, characteristics, applications. Non-Flammable hydraulic fluids- types, properties, use
7) Environmentally friendly liquid. Environmental characteristics - physiological properties, harmful working fluids for water, biological degradability, the OECD test. Legal standards relating to the operation of petroleum products on the environment

Exercise:

1) Importance of physical properties of liquids in hydraulic calculations (calculation of the friction coefficient, pressure losses, etc.). Selection of working fluids with respect to the temperature of the system.
2) Measurement of viscosity by Engler and Höppler viscometer - Program No. 1
3) Examples of the fluid compressibility, thermal expansion, specific heat capacity.
4) The calculations on the properties of compressed air, air flow measurement. Measurements of the circular velocity profile of free flow - Program No. 1
5) An experimental detection of friction coefficient in the flow of compressed air - Program No. 3
6) Individual work - calculation of the examples.
7) Consultation, Credit

Literature

Hehn, A.H. Fluid power troubleshooting. New York : Marcel Dekker. 1995. 647 p. ISBN 0-8247-9275-0

Advised literature

Hehn, A.H. Fluid power troubleshooting. New York : Marcel Dekker. 1995. 647 p. ISBN 0-8247-9275-0