A computer system (1200) includes a processor (1210) controls the computer system (1200) to perform a computer-implemented method of determining a minimum humidity required for formation and persistence of contrails produced by an engine of an aircraft. The computer-implemented method includes determining engine performance model parameters of the engine at desired operating conditions with zero humidity; determining additional energy flow out of the engine; and determining an exhaust plume temperature scaling factor. The method further comprises determining a contrail engine efficiency parameter (noverall_λ) based on additional energy flow out of the engine and the exhaust plume temperature scaling factor; and generating an improved Schmidt-Appleman equation based on the contrail engine efficiency parameter (noverall_λ). The method further includes determining an improved mixing line slope based on the improved Schmidt-Appleman equation; and determining the minimum humidity required for formation and persistence of contrails produced by the engine based on the improved mixing line slope.
METHOD FOR MAPPING CONTRAIL FORMATION TO ENGINE PERFORMANCE CHARACTERISTICS
VERFAHREN ZUR ABBILDUNG DER KONDENZSTREIFENBILDUNG AUF MOTORLEISTUNGSEIGENSCHAFTEN
PROCÉDÉ DE MAPPAGE DE FORMATION DE TRAÎNÉE DE CONDENSATION SUR DES CARACTÉRISTIQUES DE PERFORMANCE DE MOTEUR
2025-01-01
Patent
Electronic Resource
English
IPC: | F01D Strömungsmaschinen [Kraft- und Arbeitsmaschinen oder Kraftmaschinen], z.B. Dampfturbinen , NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / F02C Gasturbinenanlagen , GAS-TURBINE PLANTS / G05B Steuer- oder Regelsysteme allgemein , CONTROL OR REGULATING SYSTEMS IN GENERAL |