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Profile Drag Coefficient Formula

GoProfile Drag Coefficient given Total Drag Coefficient Formula

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The Profile Drag Coefficient is a dimensionless parameter that describes the viscous effect of the skin friction drag and the pressure drag due to the flow separation on the wing. Check FAQs

c d = \frac{F skin + D p}{q ∞ \cdot S}

c_d - Profile Drag Coefficient?F_skin - Skin Friction Drag Force?D_p - Pressure Drag Force?q_∞ - Free Stream Dynamic Pressure?S - Reference Area?

Profile Drag Coefficient Example

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Here is how the Profile Drag Coefficient equation looks like with Values.

Here is how the Profile Drag Coefficient equation looks like with Units.

Here is how the Profile Drag Coefficient equation looks like.

0.0452 = \frac{100 + 16}{450 \cdot 5.7}

0.0452 = \frac{100N + 16N}{450Pa \cdot 5.7m²}

0.0452 = \frac{100 + 16}{450 \cdot 5.7}

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Profile Drag Coefficient Solution

Follow our step by step solution on how to calculate Profile Drag Coefficient?

FIRST Step Consider the formula

c d = \frac{F skin + D p}{q ∞ \cdot S}

Next Step Substitute values of Variables

∴

c d = \frac{100N + 16N}{450Pa \cdot 5.7m²}

Next Step Prepare to Evaluate

∴

c d = \frac{100 + 16}{450 \cdot 5.7}

Next Step Evaluate

∴

c d = 0.045224171539961

LAST Step Rounding Answer

∴

c d = 0.0452

Profile Drag Coefficient Formula Elements

Variables

Profile Drag Coefficient

The Profile Drag Coefficient is a dimensionless parameter that describes the viscous effect of the skin friction drag and the pressure drag due to the flow separation on the wing.

Symbol: c_d

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Profile Drag Coefficient

Skin Friction Drag Force

Skin Friction Drag Force, also known as friction drag, is drag caused by the friction of a fluid against the surface of an object that is moving through it.

Symbol: F_skin

Measurement: ForceUnit: N

Note: Value should be greater than 0.

Formulas to find Skin Friction Drag Force

Pressure Drag Force

The Pressure Drag Force is caused by the air particles being more compressed on the front-facing surfaces and more spaced out on the back surfaces.

Symbol: D_p

Measurement: ForceUnit: N

Note: Value can be positive or negative.

Formulas to find Pressure Drag Force

Free Stream Dynamic Pressure

Free Stream Dynamic Pressure is the kinetic energy per unit volume of fluid at some distance from the body where the density and velocity are freestream values.

Symbol: q_∞

Measurement: PressureUnit: Pa

Note: Value should be greater than 0.

Formulas to find Free Stream Dynamic Pressure

Reference Area

The Reference Area is arbitrarily an area that is characteristic of the object being considered. For an aircraft wing, the wing's planform area is called the reference wing area or simply wing area.

Symbol: S

Measurement: AreaUnit: m²

Note: Value should be greater than 0.

Formulas to find Reference Area

Other Formulas to find Profile Drag Coefficient

Go Profile Drag Coefficient given Total Drag Coefficient

c d = C D - C D,i

Other formulas in Induced Drag category

Go Induced Drag Coefficient

C D,i = \frac{D i}{q ∞ \cdot S}

Go Total Drag Coefficient for Subsonic Finite Wing

C D = c d + C D,i

Go Induced Drag Coefficient given Total Drag Coefficient

C D,i = C D - c d

Go Velocity Induced at Point by Infinite Straight Vortex Filament

v i = \frac{γ}{2 \cdot π \cdot h}

How to Evaluate Profile Drag Coefficient?

Profile Drag Coefficient evaluator uses Profile Drag Coefficient = (Skin Friction Drag Force+Pressure Drag Force)/(Free Stream Dynamic Pressure*Reference Area) to evaluate the Profile Drag Coefficient, The Profile Drag Coefficient formula calculates the coefficient of the profile drag which is the sum of the skin friction drag and the pressure drag. This formula relates the profile drag coefficient to the profile drag force, which is the drag force acting on the body due to skin friction and pressure differences. Profile Drag Coefficient is denoted by c_d symbol.

How to evaluate Profile Drag Coefficient using this online evaluator? To use this online evaluator for Profile Drag Coefficient, enter Skin Friction Drag Force (F_skin), Pressure Drag Force (D_p), Free Stream Dynamic Pressure (q_∞) & Reference Area (S) and hit the calculate button.

FAQs on Profile Drag Coefficient

What is the formula to find Profile Drag Coefficient?

The formula of Profile Drag Coefficient is expressed as Profile Drag Coefficient = (Skin Friction Drag Force+Pressure Drag Force)/(Free Stream Dynamic Pressure*Reference Area). Here is an example- 0.045224 = (100+16)/(450*5.7).

How to calculate Profile Drag Coefficient?

With Skin Friction Drag Force (F_skin), Pressure Drag Force (D_p), Free Stream Dynamic Pressure (q_∞) & Reference Area (S) we can find Profile Drag Coefficient using the formula - Profile Drag Coefficient = (Skin Friction Drag Force+Pressure Drag Force)/(Free Stream Dynamic Pressure*Reference Area).

What are the other ways to Calculate Profile Drag Coefficient?

Here are the different ways to Calculate Profile Drag Coefficient-

Profile Drag Coefficient=Total Drag Coefficient-Induced Drag Coefficient

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Profile Drag Coefficient Formula

​GoProfile Drag Coefficient given Total Drag Coefficient Formula

Profile Drag Coefficient Example

Profile Drag Coefficient Solution

Profile Drag Coefficient Formula Elements

Other Formulas to find Profile Drag Coefficient

Other formulas in Induced Drag category

How to Evaluate Profile Drag Coefficient?

FAQs on Profile Drag Coefficient

Variable Name

GoProfile Drag Coefficient given Total Drag Coefficient Formula