Wake-vortex separation distances when flight-path corridors are constrained

1996 ◽  
Vol 33 (3) ◽  
pp. 539-546 ◽  
Author(s):  
Vernon J. Rossow
Keyword(s):  
Flight Path ◽  
Wake Vortex ◽  
Vortex Separation

On an analytical model of wake vortex separation of aircraft

2016 ◽  
Vol 120 (1232) ◽  
pp. 1534-1565 ◽  
Author(s):  
L.M.B.C. Campos ◽  
J.M.G. Marques
Keyword(s):  
Analytical Model ◽  
Simple Formula ◽  
Separation Distance ◽  
Civil Aviation ◽  
Wake Vortex ◽  
Atmospheric Conditions ◽  
International Civil Aviation Organization ◽  
Wake Turbulence ◽  
Vortex Separation ◽  
Light Medium

ABSTRACTA theory is presented on the effect of wake turbulence of a leading aircraft on the roll stability of a following aircraft, leading to a simple formula for the safe separation distance between the two aircraft that provides estimates of aircraft separation distances comparable to existing empirical regulations, based on experience. The formula includes the effects of flight and atmospheric conditions, and the characteristics of the leading and following aircraft; it applies to similar or dissimilar aircraft, and it indicates the parameters and conditions leading to increasing or decreasing separation. The formula is applied not only to the three International Civil Aviation Organization (ICAO) categories of aircraft (light, medium and heavy, respectively, Cessna Citation, B737 and B747) but also to ‘special’ aircraft requiring larger separation distance (Boeing 757) and to the world’s largest airliner (Airbus A380).

scholarly journals DEVELOPED CRITERIA TO IMPROVE PILOT REPORTING OF AIRPLANE VORTEX ENCOUNTERS

Aviation ◽  
2020 ◽  
Vol 23 (4) ◽  
pp. 133-142
Author(s):  
Aziz Al-Mahadin ◽  
Serdar Dalkilic
Keyword(s):  
Wake Vortex ◽  
Vortex Identification ◽  
Flight Data ◽  
Operation Efficiency ◽  
Current Process ◽  
Manual Analysis ◽  
Vortex Separation

Leading airplane vortices can be hazardous to following airplanes. The regulated minimum separations between following and leading airplanes are sometimes overjudged, hence causing reduction in the capacity of airports. In other instances, they are underjudged and subsequently causing airplane incidences. A vital contribution to the establishment and adjustment of vortex-related minimum airplane separations rely on the identification of vortex encounters through pilot reporting with a manual analysis of flight data from FDRs (flight data recorders). This current process relies on judgment of both the pilot and the airline analysist. Hence, it is subjective and sometimes lacks the required accuracy. Therefore, it is desirable to set a number of criteria, which can be utilized to evaluate the accuracy of wake vortex encounter identification. These criteria can save time, and are both accurate and simple. This study investigates 54 pilot reports of flight events to establish a set of criteria that enable concerned aviation organizations to confirm airplane vortex encounters with higher accuracy. This also helps airlines and aviation stakeholders to introduce new regulations and enhancements such as pilots and FDR analysts training on vortex identification. Such measures will enhance safety, improve aviation operation efficiency and allow revision of vortex-separation regulations.

Airport Terminal Traffic Simulation Applying Reduced Wake Vortex Separation

2010 ◽  
Author(s):  
Naoki Matayoshi ◽  
Yoshinori Okuno ◽  
Masahiko Sugiura ◽  
Mitsuru Kono ◽  
Tsutomu Yoshii ◽  
...  
Keyword(s):  
Traffic Simulation ◽  
Wake Vortex ◽  
Vortex Separation ◽  
Airport Terminal

Simulation of Runway Operations with Application of Dynamic Wake Separations to Study Runway Limitations

2020 ◽  
Vol 2674 (12) ◽  
pp. 199-211
Author(s):  
Julio Roa ◽  
Antonio Trani ◽  
Junqi Hu ◽  
Navid Mirmohammadsadeghi
Keyword(s):  
Phase Ii ◽  
Wake Vortex ◽  
International Airport ◽  
Vortex Separation ◽  
Aircraft Performance ◽  
Aircraft Wake ◽  
Operational Error ◽  
Phase Ii And Iii ◽  
The Impact ◽  
Monte Carlo Simulation Model

This paper presents an evaluation of runway operations at Chicago O’Hare International Airport to estimate the impact of proposed wake vortex separation including Recategorization Phase II and III dynamic separations. The evaluation uses a Monte Carlo simulation model that considers arrival and departure operations. The simulation accounts for static and dynamic wake vortex separations, aircraft fleet mix, runway occupancy times, aircraft approach speeds, aircraft wake circulation capacity, environmental conditions, and operational error buffers. Airport data considered for this analysis are based on Airport Surface Detection Equipment Model X records from Chicago O’Hare International Airport from January to November 2016. Dynamic wake separations are tailored to each unique set of conditions by using environmental and aircraft performance parameters as input and allowing aircraft to be exposed to the same wake vortex strength as in Recategorization Phase II (RECAT II). The analysis shows that further reductions beyond RECAT II for aircraft pairs separated by 2 nautical miles or less is not operationally feasible. These wake separations already result in little to no wake dependency. When this is the case, the challenges in wake separation are to meet runway occupancy times and to make sure aircraft separations allow for human operational variations without resulting in aircraft turnarounds or double-aircraft-occupancy runway violations.

The Study of Reducing the Take-Off Congestion

2011 ◽  
Vol 403-408 ◽  
pp. 2229-2233
Author(s):  
Wen Zhi Zhao
Keyword(s):  
Wind Speed ◽  
Occupation Time ◽  
Wake Vortex ◽  
Vortex Separation ◽  
Time Division ◽  
The Relationship

The problem of Take-Off congestion is studied, and then a new concept is proposed that the double direction Take-Off (DDT) can be adopted in the mode of time division alternatively on ordinary runway to solve the problem effectively. This mode does not violate the runway occupation rule which limits the only one aircraft on the runway at the same time for safety. The wake vortex separation limit is kept also. It will reduce the occupation time and the Take-Off and landing length wasted on runway. The relationship between the rolling distance and the wind speed is considered in relation to the runway length permission. This will lead to significant increase on effectiveness and utility of runway, equally on economic enhancement for aircrafts, airlines and airports.

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