Numerical simulation of aircraft wake vortex evolution and wake encounters based on adaptive mesh method

Zhou, Jiren; Chen, Ying‐Chun; Li, Dong; Zhang, Zeyu; Pan, Weijun

doi:10.1080/19942060.2020.1835736

Cited by 13 publications

(10 citation statements)

References 29 publications

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“…Zhou used the LES method to simulate the turbulence intensity in three different environments. The results showed that the safety of wake encounters is closely related to the development of turbulence intensity and vortex instability [3]. The Brunt-Väisälä (BV) frequency N was used to characterize atmospheric stability, and Visscher et al used the LES method to study the evolution of wake vortex under atmospheric stratification [4].…”

Section: Of 25mentioning

confidence: 99%

Study on the Influence of a Powered Nacelle on the Wake Vortex Characteristics of Wide-Body Aircraft

Wang,

Wu,

Guo

et al. 2024

Aerospace

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The aircraft wake vortex is an important factor affecting flight safety; as an important part of the aircraft, the powered nacelle will inevitably have an important impact on the aircraft wake vortex, so it is of great practical significance to research it. The present study focused on the numerical simulation of the wake flow of large aircraft (as the front aircraft) and the comparative analysis of the influence of engine jets on the wake flow. In order to meet the accuracy requirements and control the consumption of computing resources, LES and RANS methods were compared, and the RANS method was finally selected for subsequent calculation. The dynamic effect of jet flow was simulated by simplifying the boundary conditions of the inlet fan and outlet bypass as the mass flow boundary condition. The simulation results showed that the engine nacelle will have a significant impact on the morphology of the aircraft wake flow (position and strength of the main vortex in the wake flow system), which is caused by the vortices formed under the shear flow and separated flow of the nacelle. However, the nacelle will not significantly change the total strength of the wake vortex (half-plane circulation). The engine jet intensity causes additional turbulent mixing, which will accelerate the fusion of the nacelle vortex and ultimately change the intensity ratio of the inner wing vortex and the wingtip vortex, affecting the trajectory of the wake of the mean vortex. The study provides a corresponding reference for the following research on a wake vortex by a powered nacelle.

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Section: Of 25mentioning

confidence: 99%

Study on the Influence of a Powered Nacelle on the Wake Vortex Characteristics of Wide-Body Aircraft

Wang,

Wu,

Guo

et al. 2024

Aerospace

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“…The wake vortex identification can also be used as a means to increase airport capacity by minimizing the conservative delay times between departures and landings [22] by better characterizing of the position and evolution of these vortical structures. Using high-fidelity predictive modeling, hazard zones can be defined [23]. The identification of wing tip vortices is also particularly important in high-speed formation flight as it can greatly modify the dynamic load on the aircraft [24].…”

Section: Contextmentioning

confidence: 99%

Recent Advances in Passive Acoustic Localization Methods via Aircraft and Wake Vortex Aeroacoustics

Joshi

Rahman

Hickey

2022

Fluids

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Passive acoustic aircraft and wake localization methods rely on the noise emission from aircraft and their wakes for detection, tracking, and characterization. This paper takes a holistic approach to passive acoustic methods and first presents a systematic bibliographic review of aeroacoustic noise of aircraft and drones, followed by a summary of sound generation of wing tip vortices. The propagation of the sound through the atmosphere is then summarized. Passive acoustic localization techniques utilize an array of microphones along with the known character of the aeroacoustic noise source to determine the characteristics of the aircraft or its wake. This paper summarizes the current state of knowledge of acoustic localization with an emphasis on beamforming and machine learning techniques. This review brings together the fields of aeroacoustics and acoustic-based detection the advance the passive acoustic localization techniques in aerospace.

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“…The method is used to study the evolution characteristics of the aircraft wake vortex in the atmosphere. Other researchers [22] use large eddy simulation based on adaptive grids and study three different environmental turbulence intensities. Numerical results show that the refined grid in the wake region generated by the adaptive grid method can capture wake vortices more effectively.…”

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation Research on the Evolution Mechanism of Aircraft Wake Influenced by Cubic Obstacle

et al. 2022

Self Cite

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Aircraft wake is a kind of intense air movement, and the study of its generation, development, and dissipation law is of great significance to the flight safety. There are abundant researches on the evolution of aircraft wakes affected by weather and ground effects; however, there are few studies on the influence of a single obstacle on the evolution of aircraft wake. In this article, in order to explore the influence of a single obstacle on the evolution of aircraft wake, firstly, we develop a computational fluid dynamics-based method of simulation of aircraft wake affected by cubic obstacle of different heights in order to obtain the wake intensity changes and position changes before and after being affected by the obstacle. Then, the result data are visualized and analyzed, and we obtain the results of velocity and Q criterion contours, circulation, and data related to wake vortex structure. CFD simulations are conducted, including the cases of the vertical distance between wake vortex and obstacle which is 20 m, 60 m, 100 m, and no obstacle. The quantitative results indicate that a single obstacle also has a great influence on the evolution of the wake vortex. Obstacle will shorten the time for the wake vortex to enter the fast decay stage, and the smaller the distance the wake vortex is above the obstacle, the faster it enters the fast decay stage. In the same time, the circulation will reduce 20% more under the same calculation time when the wake is 20 m above the obstacle than when the wake is 100 m above the obstacle, and the circulation will reduce 45% more than when there is no obstacle. Single obstacle also leads to the generation of multiple secondary vortices and rotates around the wake vortex, resulting in the increase of wake vortex core radius, wake vortex core spacing, and wake vortex height.

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Numerical simulation of aircraft wake vortex evolution and wake encounters based on adaptive mesh method

Cited by 13 publications

References 29 publications

Study on the Influence of a Powered Nacelle on the Wake Vortex Characteristics of Wide-Body Aircraft

Study on the Influence of a Powered Nacelle on the Wake Vortex Characteristics of Wide-Body Aircraft

Recent Advances in Passive Acoustic Localization Methods via Aircraft and Wake Vortex Aeroacoustics

Large Eddy Simulation Research on the Evolution Mechanism of Aircraft Wake Influenced by Cubic Obstacle

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