Gazturbinu dzineju ekspluatacijas raksturliknu datormodelesana

In the given paper mathematical description methods of operational characteristics of gas-turbine engines of various schemes were researched for application into onboard computers, simulators and test beds. The adaptive mathematical models of direct calculation of operational characteristics for gas-turbine engines of various schemes were offered as formulas of a thrust variation and the fuel consumption under a flight altitude and speed on a mode of similarity of an engine module and the subsequent throttling on linear dependence from parameter of thrust. Linear character of drosselling dependences of thrust of various scheme engines were theoretically revealed and confirmed with experimental data from thrust parameter where for turbojet as parameter of thrust it is applied a total compression degree of gas in the engine module; but for bypass turbojet it is offered to apply a compression degree of air in the fan. A regularity of increase of steepness (turn) of drosselling characteristics of thrust and the fuel consumption of turbojet and bypass turbojet was found out at increase of flight speed (Mach number) and the way of the consideration of this phenomenon is offered. The description procedure of bypass turbojet characteristics with mixig chamber and with low by-pass ratio concerning a maximum bench mode was developed; for bypass turbojet with high by-pass ratio for a calculation of characteristics as a basic mode was offered to use a theoretical mode of the critical efflux that provides similarity of an engine module on speed of flight. It was theoretically found out, that on a mode of similarity of an engine module change of relative hourly fuel consumption by an altitude and speeds of flight does not depend on type of the gas-turbine engine. On the basis of statistical relative mass characteristics of units of engines the calculation model of the inertia moments of rotors of two-shaft bypass turbojet with retaining stages was developed. The engineering calculation procedure of transient characteristics of these engines was developed with use of change of unitary temperature criterion of engine acceleration or drop of revolutions. Doctor's paper is written in Latvian. It contains introduction, 4 units, conclusion, bibliography of 108 titles, 1 appendix, 42 illustrations, 112 pages altogether.Abstract in Latvian, English, Russian. Separate summaries in Latvian, EnglishAvailable from Latvian Academic Library / LAL - Latvian Academic LibrarySIGLELVLatvi