Three-Dimensional Flowfield Downstream of an Axial-Flow Turbine Rotor

Numerical and Experimental Investigation of Axial Gap Variation in High-Pressure Steam Turbine Stages

“…On the basis of this consideration, it has been chosen to test the 1.5-stage configuration, instead of two stages. This has allowed not only to save time and costs to design and construct the fourth row, but also to find the best compromise in terms of loading modification [5], flow field in the interstage region and downstream of blade rows [6][7][8][9], stage performance [10], and on the proper choice of the computational framework to accurately predict these effects [11]. In all these works, as well as in many others, blades aspect ratios are generally low, ranging from 0.7 to 1.5 (2.0 in exceptional case), and Reynolds numbers are low compared to the ones of a real application (from about 3.0 Â 10 5 to 8.0 Â 10 5 ).…”

Bewertung neuer Verfahren zur K"uhlung von Turbinenrotorschaufeln. Infrarotthermographie bei maschinen"ahnlichen Randbedingungen

“…Gallus et al (1995) beschreiben außerdem den Transport des nabenseitigen Passagenwirbels in Richtung der Kanalmitte durch radiale Beschleunigung im rotierenden System. Dies führt zu einer höheren Eindringtiefe des nabenseitigen Passagenwirbels im Vergleich zum gehäuseseitigen Passagenwirbel Ristic et al (1999). bestätigen diese Ergebnisse durch LDA-Messungen im rotierenden System.…”

Development of a multi-disciplinary design tool for axial flow turbines

“…As long as the mixing is complete by the time the flow leaves the region of interest, the total entropy created can be calculated without knowing the details of how and where the mixing takes place. Additionally, an experimental investigation of an axial flow turbine rotor was conducted by Ristic et al (1999) to determine the three-dimensional flow field downstream of the rotor. The wake deficit was found to be substantial, particularly at 1 percent chord, downstream of the rotor.…”