Engine-Airframe Integration Methodology for Regional Jet Aircrafts with Underwing Engines

Oliveira, Guilherme Lara; Trapp, Luis Gustavo; Puppin-Macedo, Antonini

doi:10.2514/6.2003-934

Cited by 18 publications

(15 citation statements)

References 3 publications

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“…Furthermore a careful redesign of the pylon [8] to move the peak acceleration downstream can lead to a drag reduction of 6dc. Due to the large number of degrees of freedom, computational methods such as full potential flow [9] or Euler [10] evaluations have been considered to analyse the multitude of possible configurations [9,10]. Furthermore, the development of numerical tools and an increase in computational power led to a series of AIAA Drag Prediction Workshops, where the second workshop was dedicated to propulsion installation effects [11].…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Effects of Propulsion Integration for High Bypass Ratio Engines

Stańkowski

MacManus

Robinson

et al. 2017

Journal of Aircraft

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This work describes the assessment of the effect of engine installation parameters such as engine position, size and power setting on the performance of a typical 300 seater aircraft at cruise condition. Two engines with very-high by-pass ratio and with different fan diameters and specific thrusts are initially simulated in isolation to determine the thrust and drag forces for an isolated configuration. The two engines are then assessed in an engine-airframe configuration to determine the sensitivity of the overall installation penalty to the vertical and axial engine location. The breakdown of the interference force is investigated to determine the aerodynamic origins of beneficial or penalising forces. To complete the cruise study a range of engine power settings were considered to determine the installation penalty at different phases of cruise. This work concludes with the preliminary assessment of cruise fuel burn for two engines. For the baseline engine, across the range of installed positions the resultant thrust requirement varied by 1.7% of standard net thrust. The larger engine was less sensitive with a variation of 1.3%. For an assessment over a 10000km cruise flight the overall effect of the lower specific thrust engine showed that the cycle benefits of -5.8% in specific fuel consumption was supplemented by a relatively beneficial aerodynamic installation effect but offset by the additional weight to give a -4.8% fuel burn reduction.

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Section: Introductionmentioning

confidence: 99%

Aerodynamic Effects of Propulsion Integration for High Bypass Ratio Engines

Stańkowski

MacManus

Robinson

et al. 2017

Journal of Aircraft

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“…The Blended Wing Body is a revolutionary concept offering advantages of aerodynamic performance and fuel economy (Larkin & Coates, 2017;Reist & Zingg, 2016). Engine installation on conventional transport is often mounted under the wing (Oliveira, Trapp, & Puppin-Macedo, 2003;Stankowski, MacManus, Robinson, & Sheaf, 2017). However, the engine of BWB is usually located over its center body (Ammar, Legros, & Trépanier, 2017;Plumley & Zeune, 2017).…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation for the differences between FTN/WPN engine models aerodynamic influence on BWB300 airframe

Zhang

2020

Engineering Applications of Computational Fluid Mechanics

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The difference of the aerodynamic influence of two engine models -the Flow Through Nacelle (FTN) and With Powered Nacelle (WPN) -on BWB300 airframe is analyzed by using the 3-D unsteady compressible Reynolds-Averaged Navier-Stokes (RANS) computation. The results indicate that at cruise condition, the engine shape is a primary factor affecting the BWB airframe upper fuselage surface flow, the two engine models exhibit a similar aerodynamic influence on the BWB airframe. However, at takeoff condition, the two engine models' aerodynamic influence on the airframe is different, because of the air suction caused by the WPN engine model affecting the airframe upper fuselage surface flow obviously. Moreover, at both cruise and takeoff conditions, the tube formed by the engine and airframe shape changes the surface flow under the engine and the air suction caused by the engine power accelerates the surface flow near the engine. ARTICLE HISTORY

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“…The engine in conventional transport is often located beneath and ahead of the wing [10][11][12], but the engine installation on the BWB is often located over the wing and after the body [13,14]. This arrangement helps to offset the weight of the payload, furnishing, and other systems, thus ensuring a balanced airplane [15].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation for Engine/Airframe Interaction Effects of the BWB300 on Aerodynamic Performances

Shu³

et al. 2019

International Journal of Aerospace Engineering

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The engine/airframe interaction effects of the BWB300 on aerodynamic performances were analyzed by using the numerical simulation method. The BWB300 is a 300-seat Blended Wing Body airplane designed by the Airplane Concept Design Institute of Northwestern Polytechnical University. The engine model used for simulation was simplified as a powered nacelle. The results indicated the following: at high speed, although the engine/airframe interaction effects on the aerodynamic forces were not significant, the airframe’s upper surface flow was greatly changed; at low speed, the airframe’s aerodynamic forces (of the airplane with/without the engine) were greatly different, especially at high attack angles, i.e., the effect of the engine suction caused the engine configuration aerodynamic forces of the airframe to be bigger than those without the engine; and the engine’s installation resulting in the different development of flow separation at the airframe’s upper surface caused greater obvious differences between the 2 configurations at high angles and low speed. Moreover, at low-speed high attack angles, the separated flow from the blended area caused serious distortion at the fan inlet of the engine.

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Engine-Airframe Integration Methodology for Regional Jet Aircrafts with Underwing Engines

Cited by 18 publications

References 3 publications

Aerodynamic Effects of Propulsion Integration for High Bypass Ratio Engines

Aerodynamic Effects of Propulsion Integration for High Bypass Ratio Engines

Numerical simulation for the differences between FTN/WPN engine models aerodynamic influence on BWB300 airframe

Numerical Simulation for Engine/Airframe Interaction Effects of the BWB300 on Aerodynamic Performances

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