dc.creator | Čantrak, Đorđe | |
dc.creator | Janković, Novica | |
dc.creator | Ilić, Dejan | |
dc.date.accessioned | 2023-03-09T11:03:51Z | |
dc.date.available | 2023-03-09T11:03:51Z | |
dc.date.issued | 2020 | |
dc.identifier.isbn | 978-86-6060-042-6 | |
dc.identifier.uri | http://cnntechno.com/docs/4_CNN_book_of_abstracts_CIP_Final.pdf | |
dc.identifier.uri | https://machinery.mas.bg.ac.rs/handle/123456789/5571 | |
dc.description.abstract | Some aspects of the laser Doppler anemometry (LDA) investigation of the turbulent swirl flow behind axial
fans in pipes, diffusers and jets are presented in this paper. All three installations have profiled bell mouth inlet,
while the fans are built-in in different ways. Namely, in the first case axial fan is built-in into the pipe
approximately 27.74D long, where D is average inner diameter D = 0.4 m. In the second case axial fan is builtin
into the straight conical diffuser with the inlet diameter 0.4 m and total divergence angle 8.6⁰, while in the
third case turbulent swirl jet flow behind the axial was observed. In all cases fan impeller rotation number is
varied. One-, as well as, two- and thee-component LDA systems were applied. Thermal fog seeding was
applied in all cases. Time averaged velocity profiles are analysed, as well as the statistical moments of the
second till the fourth order. In addition, distributions of the Reynolds stresses are also presented and
discussed. Investigations reveal structures, as well as complexity of the three-dimensional, non-homogenous,
anisotropic turbulent swirl flows. This stochastic character on the instantaneous level was shown for all three
cases. Kolmogorov “-5/3 law” is shown in the case of the circumferential velocity distribution for the turbulent
swirl flow in the pipe for various measuring points. Phenomenon of the non-local turbulent transfer and nongradient
turbulent diffusion is studied. The influence of the axial fan duty point on the generated turbulence
structure is studied. | sr |
dc.language.iso | en | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/35046/RS// | sr |
dc.rights | openAccess | sr |
dc.source | International Conference of Experimental and Numerical Investigations and New Technolgies, CNN TECH 2020, Session: Clear sky, June 29-July 2, Zlatibor, Serbia, pp. 65 | sr |
dc.subject | Turbulent swirl flow | sr |
dc.subject | axial fan | sr |
dc.subject | diffuser | sr |
dc.subject | pipe | sr |
dc.subject | jet | sr |
dc.title | Observations from LDA Research of the Turbulent Swirl Flow on the Axial Fan Pressure Side | sr |
dc.type | conferenceObject | sr |
dc.rights.license | ARR | sr |
dc.citation.rank | M34 | |
dc.citation.spage | 65 | |
dc.identifier.rcub | https://hdl.handle.net/21.15107/rcub_machinery_5571 | |
dc.type.version | publishedVersion | sr |