A gas mixture at a pressure of 800 kPa and a density of 5 kg/m3 enters a turbine
stage. The temperature of the gas at the nozzle exit and the stage exit are 790 K
and 750 K, respectively. Assume the specific heats are constant for the gas mixture
in the range of temperatures considered. The specific heat at constant pressure is
0.72 kJ/kg-K and the ratio of specific heats is 1.33. The value of the degree of
reaction of the turbine stage is ________ (rounded off to 2 decimal places).
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2026 Q.62)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Air-Breathing & Rocket Propulsion** under *Propulsion* (2 Marks, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Air-Breathing & Rocket Propulsion equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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