Distributed Propulsion Featuring Boundary Layer Ingestion Engines for the Blended Wing Body Subsonic Transport

2010 ◽  
Author(s):  
H. Kok ◽  
Mark Voskuijl ◽  
Michel van Tooren
Keyword(s):  
Boundary Layer ◽  
Distributed Propulsion ◽  
Blended Wing Body

scholarly journals Power Fan Design of Blended-Wing-Body Aircraft with Distributed Propulsion System

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Yuan Jia ◽  
Jinye Li ◽  
Jianghao Wu
Keyword(s):  
Boundary Layer ◽  
Internal Flow ◽  
Calculation Model ◽  
External Flow ◽  
Low Noise ◽  
Strongly Coupled ◽  
Distributed Propulsion ◽  
Blended Wing Body ◽  
Passenger Aircraft ◽  
Drag Ratio

A blended-wing-body aircraft has the advantages of high lift-to-drag ratio, low noise, and high economy compared with traditional aircraft. It is currently a solution with great potential to become a future civilian passenger aircraft. However, most airplanes with this layout use distributed power, and the power system is on the back of the fuselage, with embedded or back-supported engines. This type of design causes the boundary layer suction effect. The boundary layer ingestion (BLI) effect can fill the wake of the aircraft and improve the propulsion efficiency of the engine. However, it causes huge design difficulties, especially when the aircraft and the engine are strongly coupled. In this paper, an aircraft with a coupled engine configuration is studied. The internal and external flow fields are calculated through numerical simulation. A realistic calculation model is obtained through the coupling of boundary conditions. On the basis of the influence of the external flow on the internal flow under the coupled condition, the influence of the BLI effect on the aerodynamic performance of the fan is investigated.

scholarly journals Designing and Testing a Blended Wing Body with Boundary-Layer Ingestion Nacelles

2006 ◽  
Vol 43 (5) ◽  
pp. 1479-1489 ◽  
Author(s):  
Melissa B. Carter ◽  
Richard L. Campbell ◽  
Odis C. Pendergraft ◽  
Douglas M. Friedman ◽  
Leonel Serrano
Keyword(s):  
Boundary Layer ◽  
Blended Wing Body

Investigation of a Fuel Cell-Powered Blended Wing Body Airliner With Boundary Layer Re-Energization

2002 ◽  
Author(s):  
Vassilios A. Pachidas ◽  
Riti Singh
Keyword(s):  
Boundary Layer ◽  
Fuel Cell ◽  
High Speed ◽  
Preliminary Investigation ◽  
Specific Power ◽  
Fuel Burn ◽  
High Specific Power ◽  
Blended Wing Body ◽  
Center Body

The following study was undertaken on the assumption that hydrocarbon-based fuels may not be acceptable in the very long term, because of environmental concerns. A possible future fuel is hydrogen, and this study explores a novel proposition for a civil airliner using hydrogen fuel. The technical challenges of this preliminary investigation were: a) the integration of an electric power plant (Fuel Cell) into a Blended Wing Body (BWB) aircraft, and b) to investigate the possibility of reducing the aircraft’s profile drag by boundary layer re-energization. For the re-energization of the boundary layer and for propulsion during cruise, the study considered High-Speed/High Specific Power (HS/HSP) motors, situated at the trailing edge (TE) of the center body, driving fans. Re-energizing the boundary layer of the center body, would reduce the profile drag of the aircraft and hence, the total fuel burn. The take-off requirements of the aircraft were met, by high by-pass ratio (BPR) turbofan lift engines, operating on hydrogen, for a V/STOL (Pachidis, 2000b).

Aerodynamic benefits of boundary layer ingestion for distributed propulsion configuration

2019 ◽  
Vol 91 (10) ◽  
pp. 1285-1294 ◽  
Author(s):  
Jing Zhang ◽  
Wenwen Kang ◽  
Lingyu Yang
Keyword(s):  
Boundary Layer ◽  
Reference Value ◽  
Aerodynamic Characteristics ◽  
Comprehensive Analysis ◽  
Propulsion System ◽  
Analysis Method ◽  
Content Type ◽  
Model Based ◽  
Distributed Propulsion ◽  
Lift And Drag

Purpose Boundary layer ingestion (BLI) is one of the probable noteworthy features of distributed propulsion configuration (DPC). Because of BLI, strong coupling effects are generated between the aerodynamics and propulsion system of aircraft, leading to the specific lift and drag aerodynamic characteristics. This paper aims to propose a model-based comprehensive analysis method to investigate this unique aerodynamic. Design/methodology/approach To investigate this unique aerodynamics, a model-based comprehensive analysis method is proposed. This method uses a detailed mathematical model of the distributed propulsion system to provide the essential boundary conditions and guarantee the accuracy of calculation results. Then a synthetic three-dimensional computational model is developed to analyze the effects of BLI on the lift and drag aerodynamic characteristics. Findings Subsequently, detailed computational analyses are conducted at different flight states, and the regularities under various flight altitudes and velocities are revealed. Computational results demonstrate that BLI can improve the lift to drag ratio evidently and enable a great performance potentiality. Practical implications The general analysis method and useful regularities have reference value to DPC aircraft and other similar aircrafts. Originality/value This paper proposed a DPS model-based comprehensive analysis method of BLI benefit on aerodynamics for DPC aircraft, and the unique aerodynamics of this new configuration under various flight altitudes and velocities was revealed.

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