Research and development of asymmetrical heat transfer augmentation method in radial channels of blades for high temperature gas turbines

Shevchenko, Igor; Rogalev, Andrey; Garanin, Ivan; Vegera, Andrey; Kindra, Vladimir

doi:10.1088/1742-6596/891/1/012142

Cited by 2 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If = 0.8, then the difference by 1.5 times in temperatures results in the difference / = 1.013. Using (7) and assuming for particular area of blade as a permissible variation Δ , a permissive variation of and is defined as follows:…”

Section: Blade Thermal Model Verification Techniquementioning

confidence: 99%

“…The adequacy of both hydraulic and thermal models of cooling passage, which are based on the values of hydraulic resistance of paths with turbulators and on criterion dependencies for calculation of heat transfer from the passage walls to cooling air, has an influence on the accuracy of obtained results. Possible inadequacy of thermal and hydraulic models of manufactured full-size blade prototype is related to the fact that the values of hydraulic resistance and criterion equations used for the design are usually obtained from models with constant cross section of a greater size than passages of a real blade while the modelling conditions significantly differ from the full-scale ones [5][6][7][8]. There is almost no data of calculation of heat transfer in transitional parts of passage junctions, turns, and bifurcations.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Verification of Thermal Models of Internally Cooled Gas Turbine Blades

Shevchenko

Rogalev

et al. 2018

International Journal of Rotating Machinery

View full text Add to dashboard Cite

Numerical simulation of temperature field of cooled turbine blades is a required element of gas turbine engine design process. The verification is usually performed on the basis of results of test of full-size blade prototype on a gas-dynamic test bench. A method of calorimetric measurement in a molten metal thermostat for verification of a thermal model of cooled blade is proposed in this paper. The method allows obtaining local values of heat flux in each point of blade surface within a single experiment. The error of determination of local heat transfer coefficients using this method does not exceed 8% for blades with radial channels. An important feature of the method is that the heat load remains unchanged during the experiment and the blade outer surface temperature equals zinc melting point. The verification of thermal-hydraulic model of high-pressure turbine blade with cooling allowing asymmetrical heat removal from pressure and suction sides was carried out using the developed method. An analysis of heat transfer coefficients confirmed the high level of heat transfer in the leading edge, whose value is comparable with jet impingement heat transfer. The maximum of the heat transfer coefficients is shifted from the critical point of the leading edge to the pressure side.

show abstract

Section: Blade Thermal Model Verification Techniquementioning

confidence: 99%