Table of Contents
What is the greatest vortex strength?
a. Peak vortex speeds up to almost 300 feet per second have been recorded. The greatest vortex strength occurs when the generating aircraft is heavy-slow-clean since the turbulence from a “dirty” aircraft configuration hastens wake decay.
What is Jetwash in aviation?
Jetwash refers to the rapidly moving gases expelled from a jet engine; it is extremely turbulent but of short duration. Wingtip vortices, however, are much more stable and can remain in the air for up to three minutes after the passage of an aircraft.
What are wingtip vortices with which aircraft are they the greatest?
Wingtip vortices are greatest when the generating aircraft is “heavy, clean, and slow.” This condition is most commonly encountered during approaches or departures because an aircraft’s AOA is at the highest to produce the lift necessary to land or take off.
What is vortex strength aircraft?
However, the vortex strength from an aircraft increases proportionately to an increase in operating weight or a decrease in aircraft speed. Since the turbulence from a “dirty” aircraft configuration hastens wake decay, the greatest vortex strength occurs when the generating aircraft is HEAVY, CLEAN, and SLOW.
What is a flameout in aviation?
Definition. The run down of a jet engine for reasons other than intentionally shutting off the fuel supply.
What is excess thrust?
The thrust minus the drag of the aircraft is called the excess thrust and is also a vector quantity. Considering Newton’s second law of motion, mass m times acceleration a is equal to the net external force F on an object: F = m * a. For an aircraft, the horizontal net external force Fh is the excess thrust Fex.
What is aircraft vortex?
Wake Vortex Turbulence is defined as turbulence which is generated by the passage of an aircraft in flight. It will be generated from the point when the nose landing gear of an aircraft leaves the ground on take off and will cease to be generated when the nose landing gear touches the ground during landing.
How do you reduce vortex?
The longer the wing, the further the tips are from the main portion of the wing so the reduction in lift due to wingtip vortices is less. Therefore, increasing the aspect ratio of wings by changing the wing geometry is one way to reduce the effect of wingtip vortices. Another way is to utilise winglets.
How can flameout be prevented?
Really though, the two most important factors to avoiding a flameout are good quality pellets and a clean burn pot. Therefore, its important to protect your pellets from moisture and to get in the habit of checking the burn pot for ash build up.
How is vortex strength measured?
The product of mass flow rate and circulation = Energy (ML2T-2). So if you have a flow with mass flow rate of X kg/s in a flow with circulation of Y m2/s, then the vortical flow has a strength equivalent to XY kgm2s-2 = XY Joules.