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Information × Registration Number 0223U002007, 0119U103798 , R & D reports Title Development of a methodology for calculating the IR visibility of a gas turbine engine popup.stage_title Head Syzov Fedir F., Доктор фізико-математичних наук Registration Date 07-02-2023 Organization VE Lashkarev Institute of Semiconductor Physics of the National Academy of Sciences of Ukraine popup.description2  Numerical algorithm for estimation of IR-radiation of gas turbine engines (GTE) was developed in scope of this project. This algorithm allows modeling of IR-radiation visible from the nozzle of one- and double-circuit GTEs of complex profile. Calculation of inner engine surfaces is carried out by modelling them as a set of rotational surfaces, such as paraboloid, cone, cylinder and ring. Modeling of IR-radiation is based on Monte-Carlo methodology, which tracks stories of large quantity of probe photons with randomized flow directions. Modeling of IR-radiation of mixture of exhaust gases inside the engine is carried out in Statistical Narrow Band approximation. This allows one to encounter to high precision characteristic nature of absorption and emission spectra of various gases. Also developed algorithm has an additional option for simplified estimation of gas IR radiation in gray gas approximation. This algorithm allows one to model gas turbine engines of different modifications, having different relative spacing of first and second circuits, with or without inner body, forsage camera or internal racks. Also it is able to account the precense of different gas mixtures in different parts of engine. Also there were added such features as possibility of usage of non-radiating elementary surfaces and possibilities of visualisation of GTE scheme. There were provided numerical estimations of emission and absorption of IR-radiation by inner surfaces and exhaust gases inside of typical double-circuit GTEs, in different spectral ranges. Found and fixed a set of errors and edge cases caused by error accumulation in computer arithmetics, and by usage of computer generator of pseudo-random numbers. Product Description popup.authors Vuychik Mykola Vyacheslavovych Golenkov Oleksandr Gennadievich Gordiyenko Eduard Yurijovych Zabudskyi Viacheslav V Lysiuk Ihor Oleksandrovych Melezhyk Yevhen O. Petryakov Volodymyr O. Reva Volodymyr P Syzov Fedir F. Tetyorkin Volodymy Volodymyrovytch Tsybrii Zinoviya F. Shevchyk-Shekera Anna Volodymyrivna popup.nrat_date 2023-02-07 Close