338-0319/01 – Fluid Properties (VlaTe)
| Gurantor department | Department of Hydromechanics and Hydraulic Equipment | Credits | 3 |
| Subject guarantor | Ing. Lukáš Dvořák, Ph.D. | Subject version guarantor | Ing. Lukáš Dvořák, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Choice-compulsory |
| Year | 3 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2003/2004 | Year of cancellation | 2013/2014 |
| Intended for the faculties | FS | Intended for study types | Bachelor |
Subject aims expressed by acquired skills and competences
Students will be able to:
- select a suitable fluid for the hydraulic system
- experimentally determine basic physical properties of liquids
- apply knowledge of physical properties of liquids and gases in the calculations of fluid mechanisms.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Project work
Summary
Scope of the course is detail investigation of selected fluid properties. The
subject covers physical, chemical, ecological and operational properties of
fluids used in hydraulic systems. Selected properties of compressed air used
in pneumatic systems are included as well. Students will also get acquaint
with certain properties of non Newtonian fluids.
Compulsory literature:
Recommended literature:
Way of continuous check of knowledge in the course of semester
V průběhu semestru studenti provedou měření tří úloh, vyhodnotí výsledky a porovnají je s teoretickými výpočty. V závěru semestru vypracují samostatnou práci (výpočet zadaných příkladů).
E-learning
Other requirements
no .
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
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
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction