338-0545/03 – Modeling and Simulation of Fluid Systems (MoSi)
| Gurantor department | Department of Hydromechanics and Hydraulic Equipment | Credits | 5 |
| Subject guarantor | Ing. Jana Jablonská, Ph.D. | Subject version guarantor | prof. RNDr. Milada Kozubková, CSc. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 1 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2014/2015 | Year of cancellation | 2020/2021 |
| Intended for the faculties | FS | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Students will learn methods of electro-hydraulic analogy, circuits RLC. Their task will be to design hydraulic circuits, to solve them using numerical methods Matlab-Simulink and SimHydraulics. They will analyze the results, evaluate the accuracy by comparison the theory and experiment or possibly reconstruct the districts for better solutions. In applications they become familiar with the modeling of dynamic phenomena in the flow pipelines using methods of numerical analysis.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Summary
The course focuses on the issues of electrohydraulic analogy and solutions of RLC circuits by numerical methods using Matlab-Simulink-Simscape. Part of the course is a measurement of hydraulic variables of selected hydraulic and pneumatic circuits and develop proposals to solve them both statically and dynamically. Part of the course is devoted to the physical properties of fluids and their dynamic behavior.
Compulsory literature:
MATLAB User's Guide. The Mathworks, Inc., USA, www.mathworks.com.
Recommended literature:
Way of continuous check of knowledge in the course of semester
credits of 3 seminar papers:
1. measurement of static characteristics of pipelines and pipeline simulation in Matlab - 10 points
2. Measurement of static characteristics of pumps, pumps connected in parallel and series, simulation in Matlab - 15 points
3. Hydraulic shock measurement and simulation in Matlab - 10 points
oral and written part of the exam - 65 points
E-learning
Other requirements
Exam questions
1. Modeling and identification
2. Electrohydraulic analogy of hydraulic and pneumatic resistors, Shifting of resistors R, L, C
3. Software for solving hydraulic and pneumatic circuits, Matlab
4. Foundation Library Hydraulic + Pneumatic, SimHydraulics
5. Resistance to movement - friction resistance, friction resistance in piping
6. Circuit for friction loss determination
7. Calculation of pressure drop, Hydraulics, Pneumatic, calculation of static characteristics
8. Static characteristics - simple piping, serial, parallel system
9. Local resistance, loss coefficient, determination of calibration curve
10. Elbow, ball valve, determination of loss and flow coefficient
11. Models of hydraulic elements, opening of constant cross section (orifice plate), linear hydraulic resistance
12. Reduction, knee, opening of variable section
13. Models of pneumatic elements, pneumatic orifice of constant cross section (orifice),
14. Pumps - pumps, rotary pumps, theoretical analysis, basic parameters of pumps, pump characteristics
15. SimHydraulics centrifugal pump, 1D and 2D pump characteristics WILO RS 25/4 230 V PN 10
16. Circuits with pumps, circuit - pressure drop, circuit - static characteristic
17. Dynamic resistances, acceleration resistance, hydraulic inductance of liquid column in SimHydraulics
18. Deflection support and hydraulic capacity, gas deflection resistance, tank capacity, hydraulic fluid capacity in SimHydraulics
19. Mathematical model of liquid column, R- (L + C) cell (so-called. T cell), Numerical solution - SimHydraulics
20. Segmented piping, diagram, application
21. Sound velocity in duct, modulus of elasticity, air content
22. Hydraulic shock, experimental investigation of hydraulic shock in water, solution by electrohydraulic analogy
23. Hydraulic accumulator, hydraulic gas accumulator resistors, hydraulic shock with accumulator
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Program of the subject for individual weeks (blocks): (osnova)
1. Energy transfer, types of energy, energy transfer efficiency, modeling and identification, hydraulic and pneumatic circuits, solution methods, software
2. Resistance to movement, friction resistance, pressure drop and static pipeline characteristics, vertical piping model, calculation of hydraulic characteristics in Matlab-Simulink-Simscape
3. Local resistances (elbow, orifice, valve, tap), orifice calibration curve, static characteristic of fluid elements with local losses
4. Measurement of static characteristics of pipelines, local losses, determination of resistance
5. Valve control, local resistance in a tire, calculation of characteristics in a tire in Matlab-Simulink-Simscape
6. Pump, pump characteristics, pump shifting, suction,
7. Continuous flow, resistance to motion, resistance to acceleration, resistance to deformation and capacity, marking of hydraulic and pneumatic resistors, simulation of dynamic characteristics in Matlab
8. Mathematical model of liquid column, T-cell, segmented piping - Matlab
9. Experimental and mathematical modeling of hydraulic shock
10 Influence of air in liquid on elastic modulus and dynamics of hydraulic circuit
11. Accumulator and aerator - mathematical model, definition,
12. Pneumomotors and hydraulic motors - mathematical models
13. Transmission, Laplace and Fourier transform, system stability, physical importance of first and second order transmission, Matlab modeling.
14. Consultation of individual programs, presentation
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction