Recent advances in simulating unsteady flow phenomena brought about by passage of shock waves in a linear turbine cascade
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
- General Electric Aircraft Engines, Cincinnati, OH (United States). Turbine Aero and Cooling Technology
High-pressure-ratio turbines have flows dominated by shock structures that pass downstream into the next blade row in an unsteady fashion. Recent numerical results have indicated that these unsteady shocks may significantly affect the aerodynamic and mechanical performance of turbine blading. High cost and limited accessibility of turbine rotating equipment severely restrict the quantitative evaluation of the unsteady flow field in that environment. Recently published results of the Virginia Tech transonic cascade facility indicate high integrity in simulation of the steady state flow phenomena. The facility has recently been modified to study the unsteady effects of passing shock waves. Shock waves are generated by a shotgun blast upstream of the blade row. Shadowgraph photos and high-response pressure data are compared to previously published experimental and numerically predicted results. Plots are included that indicate large fluctuations in estimated blade lift and cascade loss.
- OSTI ID:
- 5901084
- Journal Information:
- Journal of Turbomachinery; (United States), Vol. 115:4; ISSN 0889-504X
- Country of Publication:
- United States
- Language:
- English
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