Gas Turbine Simulator (Brayton Cycle)

Educational Gas Turbine Simulator

Added only one new input: ambient temperature (T₁). Everything else stays the same.

Settings

Atmospheric pressure (P₁) 1.013 bar

Assume no intake loss: compressor inlet pressure equals atmospheric.

Ambient temperature (T₁) 288.15 K (15.0 °C)

This sets the inlet temperature for the whole cycle.

Compressor pressure ratio (PR = P₂/P₁) 10.0×

Ideal (isentropic) reference: T₂s = T₁·PR^((γ−1)/γ).

Combustor temperature rise (ΔT = T₃ − T₂) 600 K

Isobaric heat addition (P₃ = P₂): T₃ = T₂ + ΔT.

Compressor isentropic efficiency (ηc) 1.00

T₂ = T₁ + (T₂s − T₁)/ηc

Turbine isentropic efficiency (ηt) 1.00

T₄ = T₃ − ηt·(T₃ − T₄s), with P₄ = P₁

Point 1 (Inlet)

P₁ = bar

T₁ = K

s₁ = kJ/kg·K (rel.)

Point 2 (Compressor exit)

P₂ = bar

T₂ = K

s₂ = kJ/kg·K (rel.)

Point 3 (Combustor exit)

P₃ = bar

T₃ = K

s₃ = kJ/kg·K (rel.)

Point 4 (Turbine exit)

P₄ = bar

T₄ = K

s₄ = kJ/kg·K (rel.)

Assumptions

• Working fluid: ideal air
• γ = 1.4 (constant), cp = 1.004 kJ/kg·K, R = 0.287 kJ/kg·K
• 2→3 isobaric (no pressure loss), 4→1 isobaric (close the loop)
• Relative entropy: s = cp ln(T/Tref) − R ln(P/Pref)

s min (kJ/kg·K)

s max (kJ/kg·K)

T min (K)

T max (K)

Sliders tune the model (P₁, T₁, PR, ΔT, ηc, ηt). The 4 boxes tune the axis ranges only.