How do I install the Gas Turbine Cycle skill?

Run npx skillmds@latest add ashfordeou/gas-turbine-cycle in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Gas Turbine Cycle safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Gas Turbine Cycle?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Gas Turbine Cycle free to use?

Yes. Installing skills from SkillMD is free. This skill is licensed under Apache-2.

Who published Gas Turbine Cycle?

ashfordeOU (@ashfordeou) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Gas Turbine Cycle by ashfordeou — Agent Skill

Name: Gas Turbine Cycle
Author: ashfordeOU

Gas Turbine Cycle

Use when you must compute the ideal gas turbine (Brayton) cycle: estimate the thermal efficiency, the compressor exit temperature, the turbine exit temperature, and the net specific work from the pressure ratio and the cycle temperature limits. Produces the cycle efficiency, station temperatures, and specific work in SI units that gate the engine cycle assessment. Trigger: gas turbine, brayton cycle, thermal efficiency, pressure ratio, compressor, turbine, engine cycle.

ashfordeOU Updated Sep 17, 2026

File contents

Ideal Gas Turbine Cycle (propulsion/gas-turbine-cycle)

Use when the task is an ideal gas turbine (Brayton) cycle: efficiency, compressor and turbine exit temperatures, and net specific work from the pressure ratio and temperature limits.

Domain quick reference

The ideal Brayton cycle compresses isentropically, adds heat at constant pressure, expands isentropically, and rejects heat at constant pressure.
Thermal efficiency depends only on the pressure ratio: eta = 1 - PR**((1-gamma)/gamma); it rises with pressure ratio.
Isentropic temperature ratios: T2/T1 = PR**((gamma-1)/gamma) for the compressor and T4/T3 = PR**((1-gamma)/gamma) for the turbine.
Net specific work: w = cp*(T3 - T2) - cp*(T2 - T1) with the compressor exit temperature T2 from the isentropic relation.
Units: temperatures in kelvin, pressure ratio dimensionless, gamma dimensionless, cp in J/(kg K), specific work in J/kg.
Air-standard values: gamma = 1.4, cp = 1005 J/(kg K).

Workflow

Fix the pressure ratio and the temperature limits T1, T3.
Compute the efficiency with brayton_thermal_efficiency.
Compute T2 with compressor_exit_temperature.
Compute T4 with turbine_exit_temperature.
Compute the net specific work with cycle_specific_work.
Report efficiency, station temperatures, and specific work.

Pitfalls

Unit confusion: kelvin, never Celsius or Rankine, in the temperature relations.
Using total pressure instead of the pressure ratio: PR is the dimensionless ratio, not a pressure value.
Passing a pressure ratio of 1 or below, or temperatures at or below zero: the functions raise ValueError.
Quoting efficiency as a percent instead of a fraction.
Assuming gamma and cp stay constant across real components; these are ideal-cycle values.

Behavior contract (gate 3)

The efficiency, temperature, and work logic is exercised by the gate 3 contract test: scripts/test_gas_turbine_cycle.py against scripts/gas_turbine_cycle_logic.py (stdlib unittest, offline). Run: python3 scripts/test_gas_turbine_cycle.py

Compliance

Standards referenced, not reproduced: FAR-33 is US government work (public domain) and covers engine type certification, not cycle analysis methods; the ideal Brayton relations are common-knowledge thermodynamics, summary-only per standards-map.yaml.
compliance: STANDARDS-REF, gated: false.

---name: gas-turbine-cycledescription: Use when you must compute the ideal gas turbine (Brayton) cycle: estimate the thermal efficiency, the compressor exit temperature, the turbine exit temperature, and the net specific work from the pressure ratio and the cycle temperature limits. Produces the cycle efficiency, station temperatures, and specific work in SI units that gate the engine cycle assessment. Trigger: gas turbine, brayton cycle, thermal efficiency, pressure ratio, compressor, turbine, engine cycle.license: Apache-2.0---# Ideal Gas Turbine Cycle (propulsion/gas-turbine-cycle)Use when the task is an ideal gas turbine (Brayton) cycle:efficiency, compressor and turbine exit temperatures, and netspecific work from the pressure ratio and temperature limits.## Domain quick reference- The ideal Brayton cycle compresses isentropically, adds heat at constant pressure, expands isentropically, and rejects heat at constant pressure.- Thermal efficiency depends only on the pressure ratio: eta = 1 - PR**((1-gamma)/gamma); it rises with pressure ratio.- Isentropic temperature ratios: T2/T1 = PR**((gamma-1)/gamma) for the compressor and T4/T3 = PR**((1-gamma)/gamma) for the turbine.- Net specific work: w = cp*(T3 - T2) - cp*(T2 - T1) with the compressor exit temperature T2 from the isentropic relation.- Units: temperatures in kelvin, pressure ratio dimensionless, gamma dimensionless, cp in J/(kg K), specific work in J/kg.- Air-standard values: gamma = 1.4, cp = 1005 J/(kg K).## Workflow1. Fix the pressure ratio and the temperature limits T1, T3.2. Compute the efficiency with brayton_thermal_efficiency.3. Compute T2 with compressor_exit_temperature.4. Compute T4 with turbine_exit_temperature.5. Compute the net specific work with cycle_specific_work.6. Report efficiency, station temperatures, and specific work.## Pitfalls- Unit confusion: kelvin, never Celsius or Rankine, in the temperature relations.- Using total pressure instead of the pressure ratio: PR is the dimensionless ratio, not a pressure value.- Passing a pressure ratio of 1 or below, or temperatures at or below zero: the functions raise ValueError.- Quoting efficiency as a percent instead of a fraction.- Assuming gamma and cp stay constant across real components; these are ideal-cycle values.## Behavior contract (gate 3)The efficiency, temperature, and work logic is exercised by thegate 3 contract test: scripts/test_gas_turbine_cycle.py againstscripts/gas_turbine_cycle_logic.py (stdlib unittest, offline).Run:python3 scripts/test_gas_turbine_cycle.py## Compliance- Standards referenced, not reproduced: FAR-33 is US government work (public domain) and covers engine type certification, not cycle analysis methods; the ideal Brayton relations are common-knowledge thermodynamics, summary-only per standards-map.yaml.- compliance: STANDARDS-REF, gated: false.

Frequently asked questions