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THE FEUTEX TOOLKIT

Air-Standard Diesel Cycle

Estimate ideal efficiency and heat-addition state from compression and cutoff ratios.

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Formulaη=1−(rc^γ−1)/[γ(rc−1)r^(γ−1)].
Sources and model references

Worked example

Inputs

Compression ratio
16
Cutoff volume ratio
2
Heat-capacity ratio
1.4
Initial temperature
300 K

Expected results

Ideal Diesel efficiency
0.6138045817
End-of-heat-addition temperature
1818.85988 K

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter every input in the labeled units; use measured or independently specified properties.
  2. Check the stated model assumptions before calculating.
  3. Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "ratio": 16,
  "cutoff": 2,
  "gamma": 1.4,
  "temperature": 300
}

Accuracy and scope

Constant-property ideal air-standard cycle with constant-pressure heat addition. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.