Numerical Simulation Study on Propeller Slipstream Interference of High Altitude Long Endurance Unmanned Air Vehicle

Chen, Guang-Qiang; Chen, Bingyan; Li, Pengfei; Bai, Peng; Ji, Chuqun

doi:10.1016/j.proeng.2014.12.548

Cited by 8 publications

(3 citation statements)

References 4 publications

(3 reference statements)

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“…Numerical methods for calculating propeller aerodynamics include the momentum source method [32,33], the multiple reference frame model [34,35], the sliding mesh [36,37], and the moving overset grids [38,39]. These methods exhibit increasing computational complexity.…”

Section: Numerical Methods Validationmentioning

confidence: 99%

Numerical Simulation on Aerodynamic Characteristics of Transition Section of Tilt-Wing Aircraft

Huang,

He,

Jia

et al. 2024

Aerospace

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The tilt-wing aircraft has attracted widespread attention due to its excellent performance. However, its aerodynamic characteristics during the tilt transition section are characterized by unsteadiness, nonlinearity, and strong coupling, making it difficult to control. Using computational fluid dynamics (CFD) methods and moving overset grids to control the tilt-wing motion, the momentum source method is employed to replace actual propellers. The influence of the propeller on the aerodynamic characteristics of the tiltrotor at different tilt angles is investigated under incoming flow velocities of 8 m/s and 45 m/s in steady conditions. Additionally, the differences between steady and unsteady calculations of the tilt transition section are investigated at incoming flow velocities of 8 m/s, 15 m/s, 30 m/s, and 45 m/s in unsteady conditions. The research results indicate the following information: 1. the slipstream from the propellers significantly enhances the lift, drag, and stall angle of attack of the tilt-wing aircraft but reduces the lift-to-drag ratio; 2. there are noticeable differences in the forces acting on the tilt-wing aircraft between steady calculations with fixed tilt angles and unsteady calculations with continuous tilting.

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Section: Numerical Methods Validationmentioning

confidence: 99%

Numerical Simulation on Aerodynamic Characteristics of Transition Section of Tilt-Wing Aircraft

Huang,

He,

Jia

et al. 2024

Aerospace

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“…This effect decreases as the UAV climbs and this is reduced to its minimum when the UAV is cruising. Also as the propeller thrust is increased the effect of propeller slipstream is enhanced [23]. L. P. Ruiz-Calavera et al conducted a study to investigate the feasibility in predicting the vibration and loading environment if Computational Fluid Dynamics (CFD) was coupled with CSM (Computational Structural Mechanics).…”

Section: Numerical Approachmentioning

confidence: 99%

In Tune with Times: Recent Developments in Theoretical, Experimental and Numerical techniques of Aircraft Engines

Srinivas

2018

IJET

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Today the aircraft engine designing and development work is increasing drastically. Especially aircraft engines play a vital role in order to decide the aircrafts speed and its performance. Broadly turbojet, turboprop, turbo shaft and turbofan engines comes under the category of air breathing engines. Every engine has its own purpose and application. But modern aircrafts require much more advancements. Designing a new aircraft engine has been a really challenging task to the researchers. But giving a complete holistic view of aircraft engines and research gap would definitely help a lot to the new designers. Once identified the drawbacks of engine performance can be corrected in the future. For any new design of aircraft engine researchers are suggested to take Theoretical, Experimental and Numerical approaches. Therefore present paper makes an effort to review complete recent Theoretical, Experimental and Numerical approaches which are followed till date. Under all the three approaches all the air breathing engines have been clearly explained and solicited. The effort is to identify the gaps between different approaches which are hampering the process of engine development. The paper also gives the research gaps that need to be incorporated for effective performance enhancement of the aircraft engines for aeromechanical features.

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“…For a long time, loads are usually used as inputs and conditions for structural design and are obtained according to the corresponding load design codes. Compared with the traditional aircraft, the large flexible structure aircraft has many differences in structure, aerodynamics and other aspects The coupling between the structure and the aerodynamics force is also more intensive The structure design is still difficult to meet the load requirements; Although a large number of low density and high strength composite materials are widely used in the structural design process [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Modal Characteristics of Large Flexible Aircraft

Hou,

Ji,

Liu

2023

J. Phys.: Conf. Ser.

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High altitude long endurance unmanned aerial vehicle (UAV) is a type of UAV that operates at an altitude of around 10000 meters and can fly for several days, relying on solar panels.Usually, this type of aircraft has the structural characteristics of high aspect ratio, large wingspan, low wing load, and high flexibility.In engineering applications, it is often necessary to measure the vibration modes of such aircraft, and the modal measurements of such aircraft are often not accurately obtained.This article conducts relevant research on the issue of inaccurate measurement in modal experiments of such aircraft. By establishing a finite element model, the reasons for the inaccurate measurement of low order frequencies in modal experiments of such aircraft are analyzed, and the magnitude of data errors in different situations is quantitatively calculated.Based on the above research, this article proposes two methods for solving modal tests of such aircraft. This method has important guiding significance for ground modal testing of large flexible structures, which is beneficial for dynamic analysis and flight control research of such aircraft.

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Numerical Simulation Study on Propeller Slipstream Interference of High Altitude Long Endurance Unmanned Air Vehicle

Cited by 8 publications

References 4 publications

Numerical Simulation on Aerodynamic Characteristics of Transition Section of Tilt-Wing Aircraft

Numerical Simulation on Aerodynamic Characteristics of Transition Section of Tilt-Wing Aircraft

In Tune with Times: Recent Developments in Theoretical, Experimental and Numerical techniques of Aircraft Engines

Experimental Study on Modal Characteristics of Large Flexible Aircraft

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