Doll, UlrichKapulla, RalfDues, MichaelSteinbock, JonasMelnikov, SergeyRöhle, IngoMigliorini, MatteoZachos, Pavlos K.2024-01-172024-01-172023-12-11Doll U, Kapulla R, Dues M, et al., (2024) Towards time-resolved multi-property measurements by filtered Rayleigh scattering: diagnostic approach and verification. Experiments in Fluids, Volume 65, January 2024, Article number 20723-4864https://doi.org/10.1007/s00348-023-03740-6https://dspace.lib.cranfield.ac.uk/handle/1826/20670The use of multiple perspective views is a possible pathway towards the combined measurement of multiple time-resolved flow properties by filtered Rayleigh scattering (FRS). In this study, a six view observation concept is experimentally verified on a aspirated pipe flow. The concept was introduced in our previous work, and it has the ability to simultaneously measure high-accuracy time-averaged and time-resolved three-component velocity, pressure and temperature fields. To simulate time-resolution, multi-view FRS data at a single optimised excitation frequency are selected and processed for multiple flow properties. Time-averaged and quasi-time-resolved FRS results show very good agreement with differential pressure probe measurements and analytical temperature calculations and lie within ±2 m/s of complementary laser Doppler anemometry (LDA) velocity measurements for all operating points. The introduction of a multistage fitting procedure for the time-resolved analysis leads to a significant improvement of the precision by factors of 4 and 3 for temperature and axial velocity and 18 for pressure. Moreover, both processing methods show their capacity to resolve flow structures in a swirling flow configuration. It is demonstrated that the developed multi-view concept can be used to determine multiple flow variables from a singlefrequency measurement, opening the path towards time-resolved multi-parameter measurements by FRS.enAttribution 4.0 InternationalArticle