Fluid (liquid) ice protection systems, Other Engineering

FLUID (LIQUID) ICE PROTECTION SYSTEMS:

Liquid ice protection systems can be used as either anti-ice or de-ice systems.  The system is designed to project a film or fluid over the surface of the blade which when mixed with water will reduce its freezing point.  If ice is already present the fluid will penetrate below the ice layer and reduce its surface tension sufficiently to enable it to be thrown off by centrifugal force.

731_FLUID (LIQUID) ICE PROTECTION SYSTEMS1.png

1181_FLUID (LIQUID) ICE PROTECTION SYSTEMS.png

The fluid is stored in a tank and passes via a filter to an electric supply pump.  The pump is controlled by a switch on the instrument panel.  In some installations the speed of the pump and thus the quantity of fluid supplied to the propeller can be varied by the use of a rheostat.  The output fluid from the pump goes through pipelines which terminate at the rear of the propeller hub.  Attached to the propeller hub is a 'U' shaped channel called a slinger ring and from points around the slinger ring delivery nozzles are arranged to apply the fluid along the leading edge root section of each blade.  Centrifugal force will then disperse the fluid along the blades' leading edge and the airflow over the blades will allow a film of fluid to be deposited on the face and camber sides of the blades.

The airflow around the blade root however is fairly disturbed and does not always disperse the fluid where it is more required, that is where ice build up is greatest.  Propellers with this type of ice protection system usually have boots or feed shoes installed along their leading edges.  An overshoe consists of a strip of rubber or plastic material set into the leading edge of the blade, from the delivery nozzle at the root end along the blade's length.  The shoe extends about 2/3rds of the length of the blade, and has several open parallel channels in which the fluid can flow under the influence of centrifugal force.  The overflow of the channels along the length of the overshoe will evenly disperse the fluid over the blade.

Posted Date: 9/14/2012 5:08:49 AM | Location : United States







Related Discussions:- Fluid (liquid) ice protection systems, Assignment Help, Ask Question on Fluid (liquid) ice protection systems, Get Answer, Expert's Help, Fluid (liquid) ice protection systems Discussions

Write discussion on Fluid (liquid) ice protection systems
Your posts are moderated
Related Questions
A basic instrumentation system consists of a transducer, conditioning amplifier, and analog digital converter connected (in general) by analog and digital transmission lines.

How to draw diagrams for Rankine cycle

Why spiral model is called meta model?

the axle diameters of differential wheel and axle lifting machine are 254mm and 129mm respectively.the load has a mass of 36kg and the effort required is 300N.if the efficiency is

determine forces in each member of equilqteral truss

ENGINE TORQUE It is the force of rotating action about the crankshaft axis at any given instant of time. It is given by,

need it in 10 days time and in Australian cods if there is



What is Treasury Bills? Treasury expenses are one of the finance devices in temporary money market. It is unprotected promissory observe from the govt part of the RBI to satisfy