Pump & Turbomachine Performance Calculator

Evaluate pump or turbine behavior using affinity laws. Predict performance at different speeds/diameters or compute outlet conditions based on isentropic efficiency.

Pump Affinity Laws Calculator

Initial Speed (N₁):

New Speed (N₂):

Initial Diameter (D₁):

New Diameter (D₂):

Initial Flow Rate (Q₁):

Initial Head (H₁):

Initial Power (P₁):

Performance Results

New Flow Rate (Q₂): –

New Head (H₂): –

New Power (P₂): –

Specific Speed (Nₛ): –

Affinity Laws

Q₂/Q₁ = (N₂/N₁) × (D₂/D₁)³

H₂/H₁ = (N₂/N₁)² × (D₂/D₁)²

P₂/P₁ = (N₂/N₁)³ × (D₂/D₁)⁵

Compressor Performance Calculator

Inlet Temperature (T₁):

Inlet Pressure (P₁):

Outlet Pressure (P₂):

Isentropic Efficiency (η):

Mass Flow Rate:

Ratio of Specific Heats (γ):

Compressor Results

Outlet Temperature (T₂): –

Isentropic Outlet Temp (T₂ₛ): –

Compression Work: –

Pressure Ratio: –

Compressor Equations

T₂ₛ/T₁ = (P₂/P₁)^((γ-1)/γ)

T₂ = T₁ + (T₂ₛ – T₁)/η

Work = cₚ × (T₂ – T₁) × ṁ

Turbine Performance Calculator

Turbine Type:

Inlet Temperature (T₁):

Inlet Pressure (P₁):

Outlet Pressure (P₂):

Isentropic Efficiency (η):

Mass Flow Rate:

Ratio of Specific Heats (γ):

Turbine Results

Outlet Temperature (T₂): –

Isentropic Outlet Temp (T₂ₛ): –

Power Output: –

Pressure Ratio: –

Turbine Equations

T₂ₛ/T₁ = (P₂/P₁)^((γ-1)/γ)

T₂ = T₁ – η × (T₁ – T₂ₛ)

Power = cₚ × (T₁ – T₂) × ṁ

About Pump & Turbomachine Performance

This calculator helps engineers evaluate the performance of pumps, compressors, and turbines under various operating conditions. The pump calculator uses affinity laws to predict performance at different speeds or diameters. The compressor/turbine calculators determine outlet conditions based on isentropic efficiency, which is essential for preliminary design and analysis in mechanical and process engineering applications.