Ensuring the performance capability of gas turbine engine (GTE) elements is one of the high-priority engineering problems. And the issue of ensuring the thermal state of GTE body elements that operate in noise hoods (NH) is of utmost importance. Therefore during the design phase, it is necessary to possess universal methods of simulating the thermal state of the GTE body and its elements. Simulation methods should provide correct results that characterize the thermal state of the GTE body depending on its geometry, NH design and parameters and operational scheme of the engine body external cooling system that ensures heat transfer from within the hood.
The article proposes three universal methods of simulating the thermal state of the GTE body: one-dimensional, two-dimensional, three-dimensional. A brief description of the methods, their advantages and disadvantages and their application specificity are presented. The results obtained with the use of the said methods are verified on the basis of simulating and experimental testing of a prototype of the modern GTE with a capacity of 16 mW.
The verification’s results of the proposed methods show good correspondence between calculation and experimental data when simulating with the use of the two-dimensional and three-dimensional methods.
The research showed that the proposed one-dimensional simulation method can be used for an express analysis at preliminary design phases, but in specific and more complex situations this method can have significant discrepancies. In most cases, to perform an analysis, you can confine yourself to the two-dimensional simulation since it is faster than the three-dimensional simulation, but at the same time it is still quite a valid simulation method.
Keywords: GAS TURBINE ENGINE, NOISE HOOD, COVER, THERMAL STATE, SIMULATION METHODS, EXTERNAL COOLING SYSTEM, BODY, VENTILATION, TURBINE, THERMAL PROFILING, EXPERIMENTAL RESEARCH.