Expansion of working envelope of a small turbojet engine MPM-20

2012 ◽  
Author(s):  
L. Madarasz ◽  
R. Andoga ◽  
L. Fozo ◽  
J. Judicak ◽  
V. Gaspar
Keyword(s):  
Turbojet Engine

COMPUTATIONAL AND EXPERIMENTAL STUDIES OF A LOW-EMISSION BURNER FOR A PERSPECTIVE TURBOJET ENGINE WITH THE COMPRESSION RATIO EXCEEDING 40

2020 ◽  
Author(s):  
M. A. Danilov ◽  
◽  
M. V. Drobysh ◽  
A. N. Dubovitsky ◽  
F. G. Markov ◽  
...  
Keyword(s):  
Compression Ratio ◽  
Experimental Studies ◽  
The Other ◽  
Aircraft Engines ◽  
Engine Efficiency ◽  
Other Hand ◽  
Turbojet Engine ◽  
Low Emission ◽  
Civil Aircraft ◽  
The One

Restrictions of emissions for civil aircraft engines, on the one hand, and the need in increasing the engine efficiency, on the other hand, cause difficulties during development of low-emission combustors for such engines.

scholarly journals Aerodynamic analysis of the small-scaled centrifugal compressor for micro-turbojet engine applications

2021 ◽  
Vol 1891 (1) ◽  
pp. 012017
Author(s):  
A.A. Sebelev ◽  
A.S. Tikhonov ◽  
V.A. Aleksenskiy ◽  
A.A. Shengals ◽  
O.I. Klyavin
Keyword(s):  
Centrifugal Compressor ◽  
Aerodynamic Analysis ◽  
Turbojet Engine

Energetic, exergetic, exergoeconomic, environmental (4E) and sustainability performances of an unmanned aerial vehicle micro turbojet engine

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ozgur Balli ◽  
Alper Dalkıran ◽  
Tahir Hikmet Karakoç
Keyword(s):  
Environmental Sustainability ◽  
Engine Performance ◽  
Maximum Energy ◽  
Content Type ◽  
Cost Rate ◽  
Turbojet Engine ◽  
Energy And Exergy ◽  
Aerial Vehicle ◽  
Exergoeconomic Analysis ◽  
Engine Systems

Purpose This study aims to investigate the aviation, energetic, exergetic, environmental, sustainability and exergoeconomic performances of a micro turbojet engine used in unmanned aerial vehicles at four different modes. Design/methodology/approach The engine data were collected from engine test cell. The engine performance calculations were performed for four different operation modes. Findings According to the results, maximum energy and exergy efficiency were acquired as 19.19% and 18.079% at Mode 4. Total cost rate was calculated as 6.757 $/h at Mode-1, which varied to 10.131 $/h at Mode-4. Exergy cost of engine power was observed as 0.249 $/MJ at Mode-1, which decreased to 0.088 $/MJ at Mode-4 after a careful exergoeconomic analysis. Originality/value The novelty of this work is the capability to serve as a guide for similar systems with a detailed approach in the thermodynamic, thermoeconomic and environmental assessments by prioritizing efficiency, fuel consumption and cost formation. This investigation intends to establish a design of the opportunities and benefits that the thermodynamic approach provides to turbojet engine systems.

The Impact of Reference Environment Selection on the Exergy Efficiencies of Aerospace Engines

1999 ◽  
Author(s):  
Jason Etele ◽  
Marc A. Rosen
Keyword(s):  
Sea Level ◽  
Exergy Analysis ◽  
Operating Environment ◽  
A Value ◽  
Turbojet Engine ◽  
Reference Environment ◽  
The Impact

Abstract An exergy analysis is applied to a turbojet engine over a range of flight altitudes ranging from sea level to 15,000 m (∼50,000 ft), to examine the effects of using different reference-environment models. The results of this analysis using a variable reference environment (equal to the operating environment at all times) are compared to the results obtained using two constant reference environments (sea level and 15,000 m). The actual rational efficiency of the turbojet decreases with increasing altitude, ranging from a value of 16.9% at sea level to 15.3% at 15,000 m. In the most extreme cases considered, the rational efficiency value calculated using a constant reference environment varies by approximately 2% from the variable reference environment value.

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