A novel 4-sensor fast-response aerodynamic probe for non-isotropic turbulence measurement in turbomachinery flows
| Autor: | Anestis I. Kalfas, Reza S. Abhari, Alexandros Chasoglou, Michel Mansour |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Turbulence 020209 energy Mechanical Engineering lcsh:Mechanical engineering and machinery lcsh:Motor vehicles. Aeronautics. Astronautics Isotropy non-isentropic turbulence measurement Aerospace Engineering 02 engineering and technology Aerodynamics Mechanics 01 natural sciences Industrial and Manufacturing Engineering 010305 fluids & plasmas Unsteady flow 0103 physical sciences Turbomachinery 0202 electrical engineering electronic engineering information engineering multi-sensor response probes lcsh:TJ1-1570 lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:TL1-4050 unsteady flow lcsh:TK1-9971 |
| Zdroj: | Journal of the Global Power and Propulsion Society, Vol 2, Iss 1 (2018) |
| ISSN: | 2515-3080 |
| Popis: | In modern computational studies for turbomachinery applications, time, length scales and isotropy of turbulent structures are important for representative modelling. To this end, experimental data are essential to validate the numerical tools. The current article presents the development and application of a newly designed 4-sensor Fast Response Aerodynamic Probe (FRAP-4S) enabling time-resolved measurement of the three-dimensional unsteady flow velocity vector in turbomachines. The miniature multi-sensor probe demonstrates a 4 mm probe-tip. In the first part of this article the design, manufacturing and calibration results of the FRAP-4S are presented in detail. To assess the newly developed probe accuracy, comparison against traditional instrumentation developed at the Laboratory for Energy Conversion is also provided. In the second part of this work, measurements are performed at the rotor exit of a one-and-a-half stage, unshrouded and highly-loaded axial turbine configuration. The results showed increased level of unsteadiness and turbulence levels with peak-to-peak fluctuation from 5 to 35%. More importantly, in some regions stream-wise unsteadiness was found to be ten times higher, compared to the cross-wise components, an indication of the high degree of anisotropy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|