| Subject name (in Hungarian, in English) | Gas Dynamics | |||
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Gas Dynamics
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| Neptun code | BMEGEÁTNG28 | |||
| Type | study unit with contact hours | |||
| Course types and number of hours (weekly / semester) | course type: | lecture (theory) | exercise | laboratory excercise |
| number of hours (weekly): | 2 | 0 | 1 | |
| nature (connected / stand-alone): | - | - | coupled | |
| Type of assessments (quality evaluation) | mid-term grade | |||
| ECTS | 3 | |||
| Subject coordinator | name: | Dr. Farkas Balázs | ||
| post: | adjunct | |||
| contact: | farkas.balazs@gpk.bme.hu | |||
| Host organization | Department of Fluid Mechanics | |||
| http://www.ara.bme.hu/ | ||||
| Course homepage | http://www.ara.bme.hu/oktatas/tantargy/NEPTUN/BMEGEATNG28 | |||
| Course language | hungarian, english | |||
| Primary curriculum type | optional | |||
| Direct prerequisites | Strong prerequisite | none | ||
| Weak prerequisite | ||||
| Parallel prerequisite | ||||
| Milestone prerequisite | at least obtained 0 ECTS | |||
| Excluding condition | none | |||
Aim
The aim of the course is to introduce students to the gas dynamics processes occurring in high-velocity gas flow. Students will learn the classical mathematical description and calculation methods of emerging wave phenomena, boundary layers, and thermal processes associated with transonic and supersonic flow around the speed of sound. By understanding gas dynamic phenomena, students will be able to recognize how critical flow conditions affect the operation of flow systems and how their adverse effects can be avoided.
Learning outcomes
Competences that can be acquired by completing the course
Knowledge
Knows the equations describing wave propagation in compressible fluids. He knows how to demonstrate waves in compressible media in a flat water channel. It recalls the basic thermodynamic equations of perpendicular plane shock waves. It is able to apply the known relationships in a moving coordinate system, it determines the effect of reflections on the formed pressure wave systems. He knows the conditions for the formation of shock waves as well as expansion waves. He is aware of the flow conditions of the shockwave tube as well as the Laval tube. He is aware of the effect of heat transfer on wall-bounded flows. Determines the effect of wall friction on high velocity flow. He is aware of the characteristics of transient transonic flows. Understands the effect of sudden change of direction on high velocity flow.
Ability
You can use gas tables to determine the value of state variables that change through shock waves. By applying a surface theorem, it is able to determine how to reduce wave resistance. It is able to determine the characteristics of high-velocity flow in a wall-bounded system using the Fanno equation. Prepares the sizing of the Laval pipe under specific boundary conditions. Knowing the Prandtl-Meyer equations, he determines the state change caused by expansion waves. It uses waveforms to determine the characteristics of a change in the state of a gas. Interprets the effect of reflected waves in high-speed wind tunnels. It analyzes the processes taking place in the high-velocity flow boundary layers. Use Fanno theory to describe the effect of wall friction. Determines the effect of heat transfer on high velocity channel flows.
Attitude
He constantly monitors his work, results and conclusions. It expands your knowledge of high-speed flows by continuously gaining knowledge. Open to the use of information technology tools. It seeks to learn about and routinely use the tools required to solve gas dynamics problems. It develops your ability to provide accurate and error-free problem solving, engineering precision and accuracy. He publishes his results in accordance with his professional rules. It monitors changes in the social, economic and political system. It publishes its opinions and views without offending others.
Independence and responsibility
Collaborates with the instructor and fellow students to expand knowledge. Accepts well-founded professional and other critical remarks. In some situations, as part of a team, you work with your fellow students to solve tasks. With his knowledge, he makes a responsible, well-founded decision based on his analyzes. He feels responsible for energy, the problems of energy management and the sustainable use of the environment, as well as present and future generations. He is committed to the principles and methods of systematic thinking and problem solving.
Teaching methodology
The teaching of the subject takes place in the framework of lectures and laboratory practice. The lectures basically introduce the students to the information determined by the knowledge competence elements using the technique of frontal education. The application and skill-level acquisition of knowledge takes place in laboratory exercises, where an issued project work has to be solved in groups, which also develops teamwork skills. The project work must be presented at the end of the semester.
Support materials
Textbook
John D. Anderson: Fundamentals of Aerodynamics, 1991, ISBN 0-07-100767-9
Lecture notes
Lajos Lengyel: Gas Dynamics, Budapest University of Technology, Department of Fluid Mechanics, 2015, Budapest
Online material
http://www.ara.bme.hu/oktatas/tantargy/NEPTUN/BMEGEATNG28
Validity of the course description
| Start of validity: | 2025. January 1. |
| End of validity: | 2029. July 15. |
General rules
Learning outcomes are assessed on the basis of two mid-year written summary performance measures. Summative academic performance appraisal is a complex, written way of assessing the knowledge and ability type competence elements of a subject in the form of in-class papers, which asks for the necessary lexical knowledge during performance appraisal and checks students' problem-solving skills through numerical examples.
Assessment methods
Detailed description of mid-term assessments
| Mid-term assessment No. 1 | ||
| Type: | summative assessment | |
| Number: | 1 | |
| Purpose, description: | In the context of summative assessment, we examine and assess students ’learning outcomes determined by knowledge and ability type competencies. Accordingly, the summative assessment assesses the mastery of the designated theoretical knowledge as well as the existence of knowledge and the application of skills acquired in the laboratory session. The summative assessment focuses 65% on theoretical knowledge and 35% on application skills. It will be completed on the date specified in the study performance assessment plan, expected to be in the 12th week of education. 80 points can be obtained in the summary performance evaluation. At least 50% of the performance assessment must be achieved by the student for proper assessment. | |
| Mid-term assessment No. 2 | ||
| Type: | formative assessment, simple | |
| Number: | 1 | |
| Purpose, description: | The basic aim of the partial performance assessment is to examine the existence of attitudes and learning outcomes belonging to the autonomy and responsibility competence group. The way to do this is to perform a measurement task that can only be done in groups, and then to present the measurement results in front of a practical group. Assignments and assignments for groups of up to 4 should be finalized by the second week of education. The content and form requirements and evaluation principles of the prepared project dissertation are included in the terms of reference. It will be completed on the date specified in the study performance assessment plan, expected to be in the 14th week of education. You can get up to 20 points with this task. | |
Detailed description of assessments performed during the examination period
The subject does not include assessment during the examination period.
The weight of mid-term assessments in signing or in final grading
| ID | Proportion |
|---|---|
| Mid-term assessment No. 1 | 80 % |
| Mid-term assessment No. 2 | 20 % |
The weight of partial exams in grade
There is no exam belongs to the subject.
Determination of the grade
| Grade | ECTS | The grade expressed in percents |
|---|---|---|
| very good (5) | Excellent [A] | above 90 % |
| very good (5) | Very Good [B] | 85 % - 90 % |
| good (4) | Good [C] | 70 % - 85 % |
| satisfactory (3) | Satisfactory [D] | 55 % - 70 % |
| sufficient (2) | Pass [E] | 40 % - 55 % |
| insufficient (1) | Fail [F] | below 40 % |
The lower limit specified for each grade already belongs to that grade.
Attendance and participation requirements
Must be present at at least 70% (rounded down) of lectures.
At least 70% of laboratory practices (rounded down) must be actively attended.
Special rules for improving, retaken and replacement
The special rules for improving, retaken and replacement shall be interpreted and applied in conjunction with the general rules of the CoS (TVSZ).
| Need mid-term assessment to invidually complete? | ||
| yes | ||
| Can the submitted and accepted partial performance assessments be resubmitted until the end of the replacement period in order to achieve better results? | ||
| NO | ||
| The way of retaking or improving a summary assessment for the first time: | ||
| each summative assessment can be retaken or improved | ||
| Is the retaking-improving of a summary assessment allowed, and if so, than which form: | ||
| retake or grade-improving exam not possible | ||
| Taking into account the previous result in case of improvement, retaken-improvement: | ||
| new result overrides previous result | ||
| The way of retaking or improving a partial assessment for the first time: | ||
| partial assesment(s) in this group cannot be improved or repeated, the final result is assessed in accordance with Code of Studied 122. § (6) | ||
| Completion of unfinished laboratory exercises: | ||
| missed laboratory practices must be performed in the teaching term at pre-arranged appointment | ||
| Repetition of laboratory exercises that performed incorrectly (eg.: mistake in documentation) | ||
| incorrectly performed laboratory practice (e.g. Incomplete/incorrect report) can be corrected upon improved re-submission | ||
Study work required to complete the course
| Activity | hours / semester |
|---|---|
| participation in contact classes | 42 |
| preparation for laboratory practices | 14 |
| preparation for summary assessments | 16 |
| elaboration of a partial assessment task | 4 |
| additional time required to complete the subject | 14 |
| altogether | 90 |
Validity of subject requirements
| Start of validity: | 2025. January 1. |
| End of validity: | 2029. July 15. |
Primary course
The primary (main) course of the subject in which it is advertised and to which the competencies are related:
Mechanical engineering
Link to the purpose and (special) compensations of the Regulation KKK
This course aims to improve the following competencies defined in the Regulation KKK:
Knowledge
- Student is familiar with the general and specific mathematical, scientific and social principles, rules, contexts and procedures needed to operate in the field of engineering.
- Student has the knowledge of metrology and measurement theory in the field of mechanical engineering.
- Student has the detailed knowledge of the rules for the preparation of technical documentation.
Ability
- Student has the ability to apply the general and specific mathematical, scientific and social principles, rules, relationships and procedures acquired in solving problems in the field of engineering.
- Student has the ability to apply the theories and related terminology in an innovative way when solving problems in a given field of engineering.
- Student has the ability to deal with problems creatively, to solve complex problems in a flexible way, and to engage in lifelong learning and commitment to diversity and value-based approaches.
Attitude
- Student strives to meet and enforce quality standards.
- Student strives to plan and carry out tasks to a high professional standard, either independently or in a team.
- Student is open and receptive to learning, embracing and authentically communicating professional, technological development and innovation in engineering.
Independence and responsibility
- Student has the ability to work independently on engineering tasks.
- Student takes initiative in solving technical problems.
- Student takes responsibility for the sub-processes under student's management.
Prerequisites for completing the course
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Knowledge type competencies
(a set of prior knowledge, the existence of which is not obligatory, but greatly facilitates the successful completion of the subject) |
none |
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Ability type competencies
(a set of prior abilities and skills, the existence of which is not obligatory, but greatly contributes to the successful completion of the subject) |
none |