... that while the hydraulic diameter of all coupons was well captured, the pin cross section varied considerably. Along with characterizing the coupon surfaces, cooling performance was investigated by experimentally measuring friction factor and heat transfer. The variations in surface morphology as a function...

...Thomas M. Corbett; Karen A. Thole Rib turbulators are a key cooling feature that enables increased heat transfer on the interior of gas turbine components. As metal additive manufacturing becomes available for developing turbine parts, it is becoming increasingly important to understand how...

... provide a new perspective on this particular cooling configuration, based on fluidic mechanisms, newly established in a better representative setup for blockage jets aligned with pin-fins, accounting for relevant heat transfer surfaces. To this end, heat transfer on the blockage, pin-fin, and end-wall...

.... , Oliver , T. , and Bogard , D. G. , 2021 , “ Adjoint Optimization of Film Cooling Hole Geometry ,” Volume 5A: Heat Transfer—Combustors; Film Cooling, American Society of Mechanical Engineers , Virtual, Online, p. V05AT12A014 . [13] Yoon , C. , Gutierrez , D. , Furgeson , M. T...

...Tapish Agarwal; Ian Jacobi; Beni Cukurel Thermal management of turbine airfoils is a critical design consideration, but the impact of unsteadiness on heat transfer of attached flow regions has received less attention in the literature. When turbine surfaces are subjected to unsteady zero-mean flow...

... present in the combustion gases [ 13 , 14 ]. In Fig. 15 , the suction side has relatively unchanging overall effectiveness even for a 10 × change in internal channel Reynolds number. This suggests that the external convection dominates the conjugate heat transfer through the vane surface...

...Alexander J. Wildgoose; Karen A. Thole; Erika Tuneskog; Lieke Wang The complex surface morphology and multiscale surface features inherent in additively manufactured (AM) components contribute to the overall flow characteristics and heat transfer of cooling passages. As the AM process and cooling...

... be taken into account. The aim of the present work is to detail the film-cooling performance in terms of adiabatic effectiveness and external heat transfer coefficient on a 2D nozzle guide vane. A single row of cylindrical holes was tested on both pressure and suction sides of a literature vane, the VKI...

... the shape deformation associated with this additive process, the results of the CT scan imaging technique are presented. The performances are characterized both in terms of averaged heat transfer and friction factor values inside the test coupons by means of steady-state technique with a constant wall...

...Hong Wang; Peilin He; Jialong Li; Huawei Lu Particle deposition is a common phenomenon in a turbine cascade. It can change the surface condition, which influences the flow and heat transfer. It is very important to accurately predict particle deposition and surface condition changes. In this study...

... ˙ e ( x ) / m ˙ 1 c (for fixed TR) between systems originate from variation in channel pressure loss and internal convective heat transfer rate. These effects are small, so m ˙ e ( x ) / m ˙ 1 c is approximately the same for all three cooling...

...Thomas D. Walker; Clare Bonham Knowledge of heat transfer in fuel wetted passages is important for informing injector design and life estimates due to the effects of temperature on fuel degradation. Future injectors will be manufactured using additive methods in an effort to reduce production costs...

... on the radial expansion of the compressor discs, which is directly coupled to conjugate heat transfer in co-rotating discs governed by unsteady and unstable buoyancy-induced flow. This paper discusses an experimental and modeling study using the Bath Compressor Cavity Rig, which simulates a generic axial...

.... Heat transfer was simulated by solving the passive scalar transport equation with Prandtl number Pr = 0.7. The roughness topographies under investigation here are based on an X-ray computed tomography scan of an additively manufactured internal cooling passage, which had an irregular, multiscale...

... into the lower section of the annulus led to a relatively high heat flux, coupled with a blockage effect on the natural draft in the upper section of the annulus inhibiting the convective heat transfer from this section. There appears to be a relationship between the porosity of the annulus and the peak top...

...Samuel Altland; Xiang I. A. Yang; Karen A. Thole; Robert Kunz; Stephen McClain Design for cooling effectiveness in turbine blades relies on accurate models for dynamic losses and heat transfer of internal cooling passages. Metal additive manufacturing (AM) has expanded the design space...

.... in = inlet condition out = exit condition s = surface condition References [1] Wildgoose , A. J. , and Thole , K. A. , 2023 , “ Heat Transfer and Pressure Loss of Additively Manufactured Internal Cooling Channels With Various Shapes ,” ASME J. Turbomach. , 145 ( 7 ), p...

... distributions are the same in the three cases, the effective slope (ES) is very different, and the impact of this parameter on turbulence and heat transfer is analyzed at different Reynolds numbers. Fig. 1 Geometry of considered configurations: ( a ) perpendicular printing direction to the flow (ES = 0.29...

... Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 24 03 2022 10 08 2022 10 08 2022 15 09 2022 heat transfer shaped hole adiabatic effectiveness and film cooling Glenn Research Center 10.13039/100006193 NNX14AE97H Gas...

... nonreacting conditions where the location of maximum heat transfer and lowest cooling effectiveness corresponds to the location of impingement on the liner wall [ 12 ]. 1 Corresponding author. Email: sahmed22@ncsu.edu Email: bhwahls@ncsu.edu Email: sekkad@ncsu.edu Email: lee_hanjie...