Inlet Impedance Calculator

✖Entrance Energy Loss Coefficient [dimensionless] The loss coefficient (ζ) is a dimensionless number (characteristic coefficient) to calculate the head loss.ⓘ Entrance Energy Loss Coefficient [K_en]			+10% -10%
✖Exit Energy Loss Coefficient [dimensionless] is a dimensionless number (characteristic coefficient) to calculate the head loss.ⓘ Exit Energy Loss Coefficient [K_ex]			+10% -10%
✖Dimensionless Parameter is a numerical value without units used to express ratios, similarities, or relationships between physical quantities.ⓘ Dimensionless Parameter [f]			+10% -10%
✖Inlet Length is the length of a narrow water passage between peninsulas or through a barrier island leading to a bay or lagoon.ⓘ Inlet Length [L]			+10% -10%
✖Hydraulic Radius is the ratio of the cross-sectional area of a channel or pipe in which a fluid is flowing to the wet perimeter of the conduit.ⓘ Hydraulic Radius [r_H]			+10% -10%

✖Inlet Impedance is measure of opposition to airflow at an inlet, influences performance and efficiency of fluid systems.ⓘ Inlet Impedance [Z]

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Formula

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Inlet Impedance

Formula

Z = K en + K ex + (f \cdot \frac{L}{4 \cdot r H})

Example

2.246364 = 1.01 + 0.1 + (0.03 \cdot \frac{50 m}{4 \cdot 0.33 m})

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Inlet Impedance Solution

STEP 0: Pre-Calculation Summary

Formula Used

Inlet Impedance = Entrance Energy Loss Coefficient+Exit Energy Loss Coefficient+(Dimensionless Parameter*Inlet Length/(4*Hydraulic Radius))
Z = K_en+K_ex+(f*L/(4*r_H))
This formula uses 6 Variables

Variables Used

Inlet Impedance - Inlet Impedance is measure of opposition to airflow at an inlet, influences performance and efficiency of fluid systems.
Entrance Energy Loss Coefficient - Entrance Energy Loss Coefficient [dimensionless] The loss coefficient (ζ) is a dimensionless number (characteristic coefficient) to calculate the head loss.
Exit Energy Loss Coefficient - Exit Energy Loss Coefficient [dimensionless] is a dimensionless number (characteristic coefficient) to calculate the head loss.
Dimensionless Parameter - Dimensionless Parameter is a numerical value without units used to express ratios, similarities, or relationships between physical quantities.
Inlet Length - (Measured in Meter) - Inlet Length is the length of a narrow water passage between peninsulas or through a barrier island leading to a bay or lagoon.
Hydraulic Radius - (Measured in Meter) - Hydraulic Radius is the ratio of the cross-sectional area of a channel or pipe in which a fluid is flowing to the wet perimeter of the conduit.

STEP 1: Convert Input(s) to Base Unit

Entrance Energy Loss Coefficient: 1.01 --> No Conversion Required
Exit Energy Loss Coefficient: 0.1 --> No Conversion Required
Dimensionless Parameter: 0.03 --> No Conversion Required
Inlet Length: 50 Meter --> 50 Meter No Conversion Required
Hydraulic Radius: 0.33 Meter --> 0.33 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Z = K_en+K_ex+(f*L/(4*r_H)) --> 1.01+0.1+(0.03*50/(4*0.33))

Evaluating ... ...

Z = 2.24636363636364

STEP 3: Convert Result to Output's Unit

2.24636363636364 --> No Conversion Required

FINAL ANSWER

2.24636363636364 ≈ 2.246364 <-- Inlet Impedance

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Coastal and Ocean Engineering » Hydrodynamics of Tidal Inlets 1 » Inlet Hydrodynamics » Inlet Currents and Tidal Elevations » Inlet Impedance

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Coorg Institute of Technology (CIT), Coorg

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< Inlet Currents and Tidal Elevations Calculators

Change of Bay Elevation with Time for Flow through Inlet into Bay

Go Change of Bay Elevation with Time = (Average Area over the Channel Length*Average Velocity in Channel for Flow)/Surface Area of Bay

Average Area over Channel Length for Flow through Inlet into Bay

Go Average Area over the Channel Length = (Surface Area of Bay*Change of Bay Elevation with Time)/Average Velocity in Channel for Flow

Average Velocity in Channel for Flow through Inlet into Bay

Go Average Velocity in Channel for Flow = (Surface Area of Bay*Change of Bay Elevation with Time)/Average Area over the Channel Length

Surface Area of Bay for Flow through Inlet into Bay

Go Surface Area of Bay = (Average Velocity in Channel for Flow*Average Area over the Channel Length)/Change of Bay Elevation with Time

Inlet Impedance Formula

Inlet Impedance = Entrance Energy Loss Coefficient+Exit Energy Loss Coefficient+(Dimensionless Parameter*Inlet Length/(4*Hydraulic Radius))
Z = K_en+K_ex+(f*L/(4*r_H))

What is Inlet flow patterns?

An Inlet has a "gorge" where flows converge before they expand again on the opposite side. Shoal (shallow) areas that extend bayward and oceanward from the gorge depend on inlet hydraulics, wave conditions, and general geomorphology. All these interact to determine flow patterns in and around the inlet and locations where flow channels occur.

How to Calculate Inlet Impedance?

Inlet Impedance calculator uses Inlet Impedance = Entrance Energy Loss Coefficient+Exit Energy Loss Coefficient+(Dimensionless Parameter*Inlet Length/(4*Hydraulic Radius)) to calculate the Inlet Impedance, The Inlet Impedance against the ratio of inlet length to the 4/3 power of hydraulic radius for four ratios of minimum cross-section inlet width to hydraulic radius. Inlet Impedance is denoted by Z symbol.

How to calculate Inlet Impedance using this online calculator? To use this online calculator for Inlet Impedance, enter Entrance Energy Loss Coefficient (K_en), Exit Energy Loss Coefficient (K_ex), Dimensionless Parameter (f), Inlet Length (L) & Hydraulic Radius (r_H) and hit the calculate button. Here is how the Inlet Impedance calculation can be explained with given input values -> 2.246364 = 1.01+0.1+(0.03*50/(4*0.33)).

FAQ

What is Inlet Impedance?

The Inlet Impedance against the ratio of inlet length to the 4/3 power of hydraulic radius for four ratios of minimum cross-section inlet width to hydraulic radius and is represented as Z = K_en+K_ex+(f*L/(4*r_H)) or Inlet Impedance = Entrance Energy Loss Coefficient+Exit Energy Loss Coefficient+(Dimensionless Parameter*Inlet Length/(4*Hydraulic Radius)). Entrance Energy Loss Coefficient [dimensionless] The loss coefficient (ζ) is a dimensionless number (characteristic coefficient) to calculate the head loss, Exit Energy Loss Coefficient [dimensionless] is a dimensionless number (characteristic coefficient) to calculate the head loss, Dimensionless Parameter is a numerical value without units used to express ratios, similarities, or relationships between physical quantities, Inlet Length is the length of a narrow water passage between peninsulas or through a barrier island leading to a bay or lagoon & Hydraulic Radius is the ratio of the cross-sectional area of a channel or pipe in which a fluid is flowing to the wet perimeter of the conduit.

How to calculate Inlet Impedance?

The Inlet Impedance against the ratio of inlet length to the 4/3 power of hydraulic radius for four ratios of minimum cross-section inlet width to hydraulic radius is calculated using Inlet Impedance = Entrance Energy Loss Coefficient+Exit Energy Loss Coefficient+(Dimensionless Parameter*Inlet Length/(4*Hydraulic Radius)). To calculate Inlet Impedance, you need Entrance Energy Loss Coefficient (K_en), Exit Energy Loss Coefficient (K_ex), Dimensionless Parameter (f), Inlet Length (L) & Hydraulic Radius (r_H). With our tool, you need to enter the respective value for Entrance Energy Loss Coefficient, Exit Energy Loss Coefficient, Dimensionless Parameter, Inlet Length & Hydraulic Radius and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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