Projects / Programmes
Unsteady skin friction modelling in hydraulic piping systems
| Code |
Science |
Field |
Subfield |
| 2.13.07 |
Engineering sciences and technologies |
Process engineering |
Water power |
| Code |
Science |
Field |
| T140 |
Technological sciences |
Energy research |
| Code |
Science |
Field |
| 2.03 |
Engineering and Technology |
Mechanical engineering |
hydraulic piping systems, transients, unsteady flow, skin friction, dissipation
Researchers (8)
| no. |
Code |
Name and surname |
Research area |
Role |
Period |
No. of publicationsNo. of publications |
| 1. |
03923 |
PhD Anton Bergant |
Process engineering |
Head |
2013 - 2016 |
392 |
| 2. |
05912 |
PhD Andrej Bombač |
Process engineering |
Researcher |
2015 |
222 |
| 3. |
36852 |
Matic Cotič |
|
Technical associate |
2015 |
23 |
| 4. |
32071 |
PhD Jurij Gregorc |
Materials science and technology |
Researcher |
2013 - 2016 |
89 |
| 5. |
36237 |
Rok Mavrič |
Process engineering |
Researcher |
2015 - 2016 |
10 |
| 6. |
31779 |
Jernej Mazij |
Process engineering |
Researcher |
2013 - 2016 |
38 |
| 7. |
16218 |
Marko Pečar |
Process engineering |
Researcher |
2014 - 2016 |
7 |
| 8. |
03544 |
PhD Iztok Žun |
Process engineering |
Researcher |
2013 - 2016 |
540 |
Organisations (2)
Abstract
Skin friction and consequential damping in unsteady flows can significantly reduce harmful effects of large pressure transients in hydraulic piping systems and thus increases safe operation. Pipeline monitoring systems such as inverse transient analysis for leak detection (environmental impact) and pipe roughness calibration (energy losses) require accurate modelling of transients for longer simulation periods, which in many situations requires improved modelling of unsteady skin frictional behaviour. Unsteady skin friction arises from the extra losses caused by the two-dimensional nature of the unsteady velocity profile. Skin friction properties will be investigated for a number of flow types including accelerating, decelerating and oscillatory flow cases. The main objective of the research is to develop and valiadate unsteady skin friction models for investigated basic unsteady flow types and transient event types in liquid-filled pipelines. Two unsteady skin friction models will be investigated and further developed, namely the instantaneous acceleration-based model and the convolution-based model. The developed models will be implemented into a method of characteristics transient code. The developed models will be validated against experimental data from a small- and large-diameter pipeline apparatuses. Experimental data for validation study have been acquired by principal investigator during his collaborative experimental reserach work in Adelaide and Delft test facilities.
Significance for science
- better understanding of flow physics in hydraulic piping systems during transient events with particular emphasis on skin friction properties - development of novel unsteady skin friction models in pipes - research results could be applicable to other scientific fields including mathematics & physics (acoustic flow) and medicine (blood flow in arteries)
Significance for the country
- application of novel unsteady skin friction models enables optimal dimensions of piping systems, safer operation of systems and reliable on-line monitoring (on-line leakage detection) - lower weight of piping systems (optimisation of devices) yield lower material costs, lower energy consumption for manufacturing and lower operational costs - industrial growth (improved knowledge in the field of pipeline design and operation) - new jobs (continuation of long tradition of design and manufacturing of industrial piping systems) - protection of environment (advanced design and application of renewable energy systems and natural resource systems)
Most important scientific results
Annual report
2013,
2014,
2015,
final report
Most important socioeconomically and culturally relevant results
Annual report
2013,
2014,
2015,
final report
