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๐๐ž๐ซ๐ง๐จ๐ฎ๐ฅ๐ฅ๐ข'๐ฌ ๐๐ซ๐ข๐ง๐œ๐ข๐ฉ๐ฅ๐ž




๐Ÿ›ซIn fluid dynamics, Bernoulli's principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy.

๐Ÿ›ซA practical application of Bernoulli’s theorem is the Venturi tube, sometimes called a convergent / divergent duct.

๐Ÿ›ซThe Venturi tube has an inlet which narrows to a throat, and an outlet section, relatively longer, which increases in diameter towards the rear.

๐Ÿ›ซThe mass of air entering the tube must exactly equal the mass exiting the tube.

๐Ÿ›ซAt the constriction, the speed must increase to allow the same amount of air to pass in the same amount of time as in all other parts of the tube.

๐Ÿ›ซWhen the air speeds up, the pressure also decreases.

๐Ÿ›ซPast the constriction, the airflow slows and the pressure increases.

๐Ÿ›ซMass Flow is dependent on the ๐€๐ซ๐ž๐š ๐ฑ ๐ƒ๐ž๐ง๐ฌ๐ข๐ญ๐ฒ ๐ฑ ๐•๐ž๐ฅ๐จ๐œ๐ข๐ญ๐ฒ and is a constant.

๐Ÿ›ซThis is known as the ๐‚๐จ๐ง๐ญ๐ข๐ง๐ฎ๐ข๐ญ๐ฒ ๐„๐ช๐ฎ๐š๐ญ๐ข๐จ๐ง.

๐Ÿ›ซTo do this and still pass through the reduced cross-section of the throat the speed of flow through the throat must be increased.

๐Ÿ›ซIn accordance with Bernoulli’s theorem this brings about an accompanying pressure and temperature drop.

๐Ÿ›ซ Application in Aviation.

๐Ÿ›ซThe pressure drop at the throat of the venturi forms the basic principle of operation of the carburettor.

๐Ÿ›ซBernoulli's principle can be used to calculate the lift force on an aerofoil.

๐Ÿ›ซThe pitot tube and static port on an aircraft are used to determine the airspeed of the aircraft.

๐Ÿ›ซThese two devices are connected to the Air Speed Indicator, which determines the dynamic pressure of the airflow past the aircraft.

๐Ÿ›ซDynamic pressure is the difference between stagnation pressure and static pressure.

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