Cooling turboprop engine during shutdown

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F18%3A00324762" target="_blank" >RIV/68407700:21220/18:00324762 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Cooling turboprop engine during shutdown

Popis výsledku v původním jazyce

The process of cooling of the turboprop engine during its operation and shutdown is important for the lifetime of engine parts, including installed accessories and measuring sensors located on the engine. In the case of normal engine operation, whether on-ground or on-flight, the engine is cooled by ambient air flowing in the direction of the longitudinal axis of the engine. In the case of shutdown, its cooling is limited by the heat transfer between the engine and the engine nacelle. In this case, the heat transfer mechanism is controlled by the natural convection and, since the surface engine temperatures are in order of hundreds degrees of Celsius, the radiation transfer mechanism also plays a significant role. This paper is focused on the numerical simulation of the turboprop engine cooling with ANSYS CFD software. The simulation is performed on a simplified annulus geometry where the inner diameter represents the engine body and the outer ring replaces the nacelle. On this geometry, the simultaneous transfer of heat by the natural convection (Boussinesq model and temperature dependent density model) and radiation (S2S and P1 models) are solved. In the experiments, the surface temperatures were measured during the cooling of the engine along with the surface temperatures of the nacelle. The experimental temperatures at the engine surface served as the boundary condition of the first kind in the numerical solution, and corresponding simulated surface temperatures at the engine nacelle are compared with the experimentally determined temperatures.

Název v anglickém jazyce

Cooling turboprop engine during shutdown

Popis výsledku anglicky

The process of cooling of the turboprop engine during its operation and shutdown is important for the lifetime of engine parts, including installed accessories and measuring sensors located on the engine. In the case of normal engine operation, whether on-ground or on-flight, the engine is cooled by ambient air flowing in the direction of the longitudinal axis of the engine. In the case of shutdown, its cooling is limited by the heat transfer between the engine and the engine nacelle. In this case, the heat transfer mechanism is controlled by the natural convection and, since the surface engine temperatures are in order of hundreds degrees of Celsius, the radiation transfer mechanism also plays a significant role. This paper is focused on the numerical simulation of the turboprop engine cooling with ANSYS CFD software. The simulation is performed on a simplified annulus geometry where the inner diameter represents the engine body and the outer ring replaces the nacelle. On this geometry, the simultaneous transfer of heat by the natural convection (Boussinesq model and temperature dependent density model) and radiation (S2S and P1 models) are solved. In the experiments, the surface temperatures were measured during the cooling of the engine along with the surface temperatures of the nacelle. The experimental temperatures at the engine surface served as the boundary condition of the first kind in the numerical solution, and corresponding simulated surface temperatures at the engine nacelle are compared with the experimentally determined temperatures.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20304 - Aerospace engineering

Projekt

<a href="/cs/project/EF16_019%2F0000826" target="_blank" >EF16_019/0000826: Centrum pokročilých leteckých technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů