DOI: https://doi.org/10.20998/2078-774X.2019.03.03

MODELING OF GAS TURBINE COOLING SYSTEMS WITH AIR COOLERS

Alexander Tarasov, Oksana Lytvynenko, Irina Myhaylova

Анотація


When cooling gas turbines, an air cooler can be used what presents certain difficulties for the modeling. It is caused by the fact that modern gas turbine cooling system may consist of 1000 or more channels. Modeling of such large systems is successfully performed using the THA (Thermal & Hydraulic Analysis) software package. The method implemented in THA can also be used for air cooler analysis. However, the inserting of the heat exchanger in the general scheme significantly complicates the total scheme. In this regard, it was proposed to represent the heat exchanger with single channel, the properties of which completely determine the different types of heat exchangers. To substantiate this analysis of the operation of a tubular heat exchanger was performed with the help of THA for heat carriers: air-air, air-water, and water-water. It was found that the efficiency of the heat exchanger depends mainly only on the ratio of the mass flow rate heat capacities of the heat-transfer agents. A small scatter of efficiency values relative to the heat exchanger is explained by the dependence of the properties of heat transfer fluid on temperature and pressure. It noted that the coefficient of hydraulic resistance of the heat exchanger as a whole depends on the Reynolds number, wherein the determining the size of an arbitrary diameter can be selected, for example, the diameter of inlet pipe. As a result of such generalizations, a channel of the "heat exchanger" for hydraulic network was created, which absorbed all the main characteristics of the heat exchanger. In conclusion, using THA was carried out comparative calculation of the detailed design of the heat exchanger and the simplified scheme in which the heat exchanger was represented by single channel. A good agreement was obtained between the calculation results, which allow recommending this channel for using in gas turbine cooling systems.


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Посилання


Tarasov, A. I., Dolgov A. I. (2006), THA (Thermal & Hydraulic Analysis): Svidetel'stvo ob oficial'noj registracii programm dlja JeVM. Patent 2007610141, 10 November 2006. Federal'naja sluzhba po intellektual'noj sobstvennosti, patentam i tovarnym znakam, RU.

Kutateladze S. S., Borishanskii V. M. (1959), Directory heat transfer, State Energy Publishing Leningrad, Moscow, 414 p.

Tarasov A. I., Dolgov A. I. (2010), "Strategy for optimizing cooling systems for gas turbine blades LP-search that applies to the network model", Electronic modelin, no. 1, vol. 32, pp. 105–112, NAS of Ukraine, Kiev.

Tarasov A. I., Dolgov A. I. (2013), "Cooling system optimization of the power gas turbine rotor blade", Bulletin of NTU "KhPI". Series: Power and heat engineering processes and equipment, no. 12(986). pp. 69–76, ISSN 2078-774X

Tarasov, A. I., Lytvynenko, O. A. and Myhaylova, I. A. (2016), "Analysis of the Method for Back Pressure Prediction in the Air Supply Path From Compressor in the Gas Turbine Rotor", Bulletin of NTU "KhPI". Series: Power and heat engineering processes and equipment, no. 8(1180), pp. 54–59, ISSN 2078-774X, doi: 10.20998/2078-774X.2016.08.07.

Tarasov, A. I., Lytvynenko, O. A. and Myhaylova, I. A. (2017), "Metering Characteristics of the Openings Used for the Cooling Systems of Gas Turbines", Bulletin of NTU "KhPI". Series: Power and heat engineering processes and equipment, no. 10(1232), pp. 52–58, ISSN 2078-774X, doi: 10.20998/2078-774X.2017.10.07.


Пристатейна бібліографія ГОСТ


1.   Тарасов А. И., Долгов А. И. THA (Thermal & Hydraulic Analysis): Свидетельство об официальной регистрации программ для ЭВМ №2007610141, 10 ноября 2006. Федеральная служба по интеллектуальной собственности, патентам и товарным знакам, Россия.

2.   Кутателадзе С. С., Боришанский В. М. Справочник по теплопередаче. Москва: Государственное энергетическое издательство Ленинград, 1959. 414 с.

3.   Тарасов, А. И., Долгов А. И. Стратегия оптимизации систем охлаждения лопаток газовой турбины методом LP-поиска применительно к сетевой модели. Электронное моделирование. Киев: НАН Украины, 2010. № 1. Т. 32. С. 105–112.

4.   Тарасов, А. И., Долгов А. И. Оптимизация системы охлаждения рабочей лопатки энергетической газовой турбины. Вісник НТУ «ХПІ». Серія: Енергетичні та теплотехнічні процеси й устаткування. Харків: НТУ «ХПІ», 2013. № 12(986). С. 69–76. Бібліогр.: 7 назв. ISSN 2078-774X.

5.   Тарасов А. И., Литвиненко О. А., Михайлова И. А. Анализ метода расчета противодавления в тракте подачи воздуха из компрессора в ротор газовой турбины. Вісник НТУ «ХПІ». Серія: Енергетичні та теплотехнічні процеси й устаткування. Харків: НТУ «ХПІ», 2016. № 8(1180). С. 54–59. Бібліогр. : 14 назв. ISSN 2078-774X. doi: 10.20998/2078-774X.2016.08.07.

6.   Тарасов А. И., Литвиненко О. А., Михайлова И. А. Расходные характеристики отверстий, применяемых в системах охлаждения газовых турбин. Вісник НТУ «ХПІ». Серія: Енергетичні та теплотехнічні процеси й устаткування. Харків : НТУ «ХПІ», 2017. № 10(1232). С. 52–58. Бібліогр.: 6 назв. ISSN 2078-774X. doi: 10.20998/2078-774X.2017.10.07.