REHEATED TURBOJET ENGINE THRUST CONTROL METHOD Russian patent published in 2003 - IPC

FIELD: aviation industry reheated turbojet engines. SUBSTANCE: proposed method comes to measuring thrust R₀, pressure P₀ and air temperature T₀ at engine outlet and measuring also air-fuel ratio α. on stand. Novelty in proposed method is that fuel combustion efficiency η depending on air-fuel ratio α is determined and influence of fuel combustion efficiency onto thrust is calculated by formula where Δη is change of fuel combustion efficiency, and partial pressure of water vapors in air P_a is measured and with thrust thus found, correction is introduced ΔR = kR_o[η(α)-η(α_e)] where α_e is corrected air-fuel ratio found from formula α_e = α(1-P_a/P_o). EFFECT: stability of thrust for all engines of the type irrespective of atmospheric conditions at stand tests. 1 ex