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Otto Cycle

An Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark-ignition piston engine.

The thermal efficiency equals 1 minus the compression ratio to the power of 1 minus the heat capacity ratio.

Formula

QuantityVariable[Subscript["η", "th"], "ThermalEfficiency"] == 1 - QuantityVariable["r", "Unitless"]^(1 - QuantityVariable["γ", "HeatCapacityRatio"])

symbol description physical quantity
ηth thermal efficiency "ThermalEfficiency"
r compression ratio "Unitless"
γ heat capacity ratio "HeatCapacityRatio"

Forms

Examples

Get the resource:

In[1]:=
ResourceObject["Otto Cycle"]
Out[1]=

Get the formula:

In[2]:=
FormulaData[ResourceObject["Otto Cycle"]]
Out[2]=

Use some values:

In[3]:=
FormulaData[
 ResourceObject["Otto Cycle"], {QuantityVariable["r","Unitless"] -> 5,
   QuantityVariable["\[Gamma]","HeatCapacityRatio"] -> 1.4`}]
Out[3]=

Source Metadata

Publisher Information