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Turbofan

About: Turbofan is a research topic. Over the lifetime, 4114 publications have been published within this topic receiving 39490 citations. The topic is also known as: fanjet & turbofan engine.


Papers
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Journal ArticleDOI
TL;DR: In this paper, a small disturbance formulation for the analysis of the inviscid flow over a turbofan forced mixer configuration in which the governing equations are reduced by means of a flux volume formulation along a Cartesian grid is presently extended to include the effects of power addition within the potential formulation.
Abstract: A small disturbance formulation for the three-dimensional potential analysis of the inviscid flow over a turbofan forced mixer configuration in which the governing equations are reduced by means of a flux volume formulation along a Cartesian grid is presently extended to include the effects of power addition within the potential formulation. Calculations are presented for practical turbofan mixer designs, and comparison calculations are also given with measured surface pressure distributions and measured axial velocity profiles.

13 citations

Proceedings ArticleDOI
05 Jun 1995
TL;DR: In this article, an axisymmetric average of the three-dimensional fluid flow equations within a turbofan engine is presented, which simultaneously represent the major engine components and include terms for blade forces, loss, combustor heat addition, blockage, bleeds and convective mixing in the mixer.
Abstract: An equation and numerical solution procedure for a steady-state aerodynamic analysis of a turbofan engine in the meridional plane is presented. An axisymmetric average of the three-dimensional fluid flow equations within the engine is presented. The equations simultaneously represent the major engine components and include terms for blade forces, loss, combustor heat addition, blockage, bleeds and convective mixing in the mixer. These general equations are specialized with modeled terms and advanced to a steady-state with a time-marching scheme on a multi-block grid. The procedure is verified with comparisons to one-dimensional analytic solutions and a compressor stage. How this procedure can capture component interactions is demonstrated with a solution for General Electric’s Energy Efficient engine, which is representative of modern turbofan engines.Copyright © 1995 by ASME

13 citations

Journal ArticleDOI
D. A. Topol1
TL;DR: In this paper, a rotor wake/stator interaction noise prediction method is presented and evaluated with fan rig and full-scale engine data using a two-dimensionala l semi-empirical wake model and an analytical stator response function and noise calculation.
Abstract: A rotor wake/stator interaction noise prediction method is presented and evaluated with fan rig and fullscale engine data. The noise prediction method uses a two-dimensiona l semiempirical wake model and an analytical stator response function and noise calculation. The stator response function is a two-dimensional strip theory which is linked to a noise calculation formulated in a constant area annular duct with mean axial flow. Comparisons are made with data from an advanced ducted propeller (ADP) fan rig which is a next-generation turbofan engine design. A calibration of the prediction model is attempted using these rig data. The calibrated method is subsequently utilized to calculate and compare with noise test data from a 4.1-in.-diam fan rig and from a full-scale turbofan engine configuration. Results indicate that the method has promise, but that further improvement is desirable.

13 citations

Patent
23 Jun 1993
TL;DR: In this paper, a modified exhaust tailpipe especially for use with an aircraft turbofan engine utilizing a noise suppressor is presented, which increases in diameter to form a bulge to increase the flow area for fan gases in the area of a mixer.
Abstract: A modified exhaust tailpipe especially for use with an aircraft turbofan engine utilizing a noise suppressor. The modified tailpipe is connected to the exhaust duct of the engine. The forward end of the tailpipe is essentially the same diameter as that of the exhaust duct of the engine. The contour of the tailpipe is such that it increases in diameter to form a bulge to increase the flow area for fan gases in the area of a mixer which is supported within the forward end of the tailpipe exhaust system. This improves the operating efficiency of the jet engine.

13 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023163
2022320
2021112
2020131
2019175
2018189