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Fuel Jet Velocity Formula

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Fuel jet velocity is the velocity of fuel injection at the exit of the orifice. Check FAQs

V fj = C d \cdot \sqrt{(\frac{2 \cdot (p in - p cy)}{ρ f})}

V_fj - Fuel Jet Velocity?C_d - Coefficient of Discharge?p_in - Fuel Injection Pressure?p_cy - Pressure of charge inside the cylinder?ρ_f - Density of Fuel?

Fuel Jet Velocity Example

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Here is how the Fuel Jet Velocity equation looks like with Values.

Here is how the Fuel Jet Velocity equation looks like with Units.

Here is how the Fuel Jet Velocity equation looks like.

123.9924 = 0.66 \cdot \sqrt{(\frac{2 \cdot (200 - 50)}{850})}

123.9924m/s = 0.66 \cdot \sqrt{(\frac{2 \cdot (200Bar - 50Bar)}{850kg/m³})}

123.9924 = 0.66 \cdot \sqrt{(\frac{2 \cdot (200 - 50)}{850})}

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Fuel Jet Velocity Solution

Follow our step by step solution on how to calculate Fuel Jet Velocity?

FIRST Step Consider the formula

V fj = C d \cdot \sqrt{(\frac{2 \cdot (p in - p cy)}{ρ f})}

Next Step Substitute values of Variables

∴

V fj = 0.66 \cdot \sqrt{(\frac{2 \cdot (200Bar - 50Bar)}{850kg/m³})}

Next Step Convert Units

∴

V fj = 0.66 \cdot \sqrt{(\frac{2 \cdot (2E+7Pa - 5E+6Pa)}{850kg/m³})}

Next Step Prepare to Evaluate

∴

V fj = 0.66 \cdot \sqrt{(\frac{2 \cdot (2E+7 - 5E+6)}{850})}

Next Step Evaluate

∴

V fj = 123.99240963486m/s

LAST Step Rounding Answer

∴

V fj = 123.9924m/s

Fuel Jet Velocity Formula Elements

Variables

Functions

Fuel Jet Velocity

Fuel jet velocity is the velocity of fuel injection at the exit of the orifice.

Symbol: V_fj

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Fuel Jet Velocity

Coefficient of Discharge

Coefficient of Discharge is ratio of actual discharge to theoretical discharge.

Symbol: C_d

Measurement: NAUnit: Unitless

Note: Value should be between 0 to 1.

Formulas to find Coefficient of Discharge

Fuel Injection Pressure

Fuel injection pressure is the pressure at the inlet of injector with which the fuel will be injected into the engine's combustion chamber.

Symbol: p_in

Measurement: PressureUnit: Bar

Note: Value should be greater than 0.

Formulas to find Fuel Injection Pressure

Pressure of charge inside the cylinder

Pressure of charge inside the cylinder is the pressure in the combustion chamber or pressure of charge during injection.

Symbol: p_cy

Measurement: PressureUnit: Bar

Note: Value should be greater than 0.

Formulas to find Pressure of charge inside the cylinder

Density of Fuel

Density of Fuel is defined as the ratio of the mass of the fuel to its volume considered.

Symbol: ρ_f

Measurement: DensityUnit: kg/m³

Note: Value should be greater than 0.

Formulas to find Density of Fuel

sqrt

A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number.

Syntax: sqrt(Number)

Other formulas in Fuel Injection in IC Engine category

Go Fuel Velocity at Time of Release into Engine Cylinder

V 2 = \sqrt{2 \cdot v f \cdot (P 1 - P2)}

Go Actual Fuel Velocity of Injection Considering Orifice Flow Coefficient

V f = C f \cdot \sqrt{\frac{2 \cdot (P 1 - P2) \cdot 100000}{ρ f}}

Go Number of Fuel Injections Per Minute for Four Stroke Engine

N i = \frac{ω e}{2}

Go Total Time Taken for Fuel Injection in One Cycle

T f = \frac{θ}{360} \cdot \frac{60}{ω e}

How to Evaluate Fuel Jet Velocity?

Fuel Jet Velocity evaluator uses Fuel Jet Velocity = Coefficient of Discharge*sqrt(((2*(Fuel Injection Pressure-Pressure of charge inside the cylinder))/Density of Fuel)) to evaluate the Fuel Jet Velocity, The Fuel Jet Velocity formula is defined as the velocity with the fuel will be injected from the fuel injector into the engine's combustion chamber. It depends on coefficient of discharge for the orifice, fuel density and also the average pressure difference over the injection period. Fuel Jet Velocity is denoted by V_fj symbol.

How to evaluate Fuel Jet Velocity using this online evaluator? To use this online evaluator for Fuel Jet Velocity, enter Coefficient of Discharge (C_d), Fuel Injection Pressure (p_in), Pressure of charge inside the cylinder (p_cy) & Density of Fuel (ρ_f) and hit the calculate button.

FAQs on Fuel Jet Velocity

What is the formula to find Fuel Jet Velocity?

The formula of Fuel Jet Velocity is expressed as Fuel Jet Velocity = Coefficient of Discharge*sqrt(((2*(Fuel Injection Pressure-Pressure of charge inside the cylinder))/Density of Fuel)). Here is an example- 123.9924 = 0.66*sqrt(((2*(20000000-5000000))/850)).

How to calculate Fuel Jet Velocity?

With Coefficient of Discharge (C_d), Fuel Injection Pressure (p_in), Pressure of charge inside the cylinder (p_cy) & Density of Fuel (ρ_f) we can find Fuel Jet Velocity using the formula - Fuel Jet Velocity = Coefficient of Discharge*sqrt(((2*(Fuel Injection Pressure-Pressure of charge inside the cylinder))/Density of Fuel)). This formula also uses Square Root (sqrt) function(s).

Can the Fuel Jet Velocity be negative?

No, the Fuel Jet Velocity, measured in Speed cannot be negative.

Which unit is used to measure Fuel Jet Velocity?

Fuel Jet Velocity is usually measured using the Meter per Second[m/s] for Speed. Meter per Minute[m/s], Meter per Hour[m/s], Kilometer per Hour[m/s] are the few other units in which Fuel Jet Velocity can be measured.

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Fuel Jet Velocity Formula

Fuel Jet Velocity Example

Fuel Jet Velocity Solution

Fuel Jet Velocity Formula Elements

Other formulas in Fuel Injection in IC Engine category

How to Evaluate Fuel Jet Velocity?

FAQs on Fuel Jet Velocity

Variable Name