Flow modeling in a jet engine

• Autorzy: Hlavńa V. , Rajčan P.
• Języki publikacji: EN

Abstrakty

EN

It is possible to monitor effects related to flow in a jet aircraft engine by the three basic approaches - analytical, numerical and experimental Each approach has undergone changes and has been developed to the stage of its effective use. To efficiently manage the scientific and research work it is appropriate to use effective links among all three basic approaches. An experimental approach requires a test stand on which the characteristics of a usually geometrically reduced object or the actual object itself are verified. The principles of geometric and hydrodynamic similarities are applied. This approach is time and economically demanding and not all aerodynamic processes can be reliably simulated. Other disaavantages can be the occurrence of measurement errors, errors due to changes in the scale, influences of chemical reactions and influence of Reynolds number. Due to a very fast onset, development and challenges of IT, the numerical approach has become mostly used. It can provide sufficient information on an examined phenomenon in a particular object. It does not need any substantial simpliflcations, it is less financially demanding than the experimental approach, but it needs efficient processors with a huge memory capacity. Its disadvantage is a relatively large dependence of achieved results accuracy on the perfection of numerical models and models of turbulence in the areas with prevailing influence ofviscosity. The usage ofanalytical relations from mathematical andphysical analysis of the flow fleld is the fundamental of the analytical approach of observing the laws related to flowing. The paper deals with possibilities, procedures, advantages, and disadvantages of the mentioned approaches together with a presentation of some results from research and development activities carried out by the authors.

Słowa kluczowe

EN

jet engine; flow; experimental approach; numerical approach; analytical approach

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 4
• Strony: 191--197
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Hlavńa V.

autor

Rajčan P.

• University of Žilina, Faculty of Mechanical Engineering Department of Automotive Technology Univerzitna 8215/1 010 26 Žilina, Slovakia tel: [phone], fax: [phone],

Bibliografia

• [1] Hlavna, V., Kovalčík, A., Toporcer, E., Modeling of flow in an evaporator of a nonconventional combustion engine, In Combustion Engines - Silniki Spalinowe, ISSN 0138-0346, 2009, No. 2009-SC1.
• [2] Hlavna, V., Kukuča, P., Lábaj, J., The modelling of flow in a combustion chamber, In Revista de Matemáticas Aplicadas, Santiago, Chile 1995.
• [3] Kovalčík, A., Pressure and flow measurement in a nonconventional energetic system, In proceedings of international conference TRANSCOM 2009, Section 6, EDIS – Publishing house of University of Žilina 2009.
• [4] Kovalčík, A., Toporcer, E., Selection of an engine for innovation of a small tractor, In proceedings of international conference TRANSCOM 2009, Section 6, EDIS – Publishing house of University of Žilina 2009.
• [5] Mruk, A., Szlachta, Z. Cisek, J., Efekty zastosowania ceramicznej powłoki na denku tłoka lnika wysokoprężnego, IV Sympozjum Naukowo-Technicznego ‘Silniki spalinowe w zastosowaniach wojskowych, Jurata 1999.
• [6] Mucha, W., Toporcer, E., Kukuča, P., Isteník, R., Hudák, A., Model nekonvenčného spal'ovacieho motora FIK1, In proceedings of international conference Perner´s contact 2003, Pardubice 2003.
• [7] SK-PL-0035-09, (SK-PL-0035-09/8027/2010).
• [8] VEGA 1/0554/10.