VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
13.
Identification of noise generation and flow kinematics in the air gap for two different blade tip designs of an axial fan
Milavec, Matej ...
Importance of the role of axial fans in our everyday life as well as in industrial sphere is crucial. Their presence dictates indispensable reduction of the emitted noise level. The aerodynamically ...born noise due to the kinematics of the air-flow in the gap between rotor and stator is one predominant source of emitted noise by most fans and is the most intensive within the human audible spectrum. Two different rotor blade tip shapes A and B were analysed in details and the results presented in this paper. Their influence on the emitted noise was determined by measurements of the integral aerodynamic characteristic and by the level of the sound pressure level of the fan. It was confirmed that the kinematics of the air-flow within the blade tip gap is significantly different for both observed blade tip designs and plays a crucial role when generation and size of the total emitted noise power is concerned. Frequency spectra of the measured noise pressure level for both observed blade designs was also essentially different and served to confirm the well-known fact that intensity of the sound pressure level decreases with the frequency, which helps to assess and identify mechanisms of the noise generation. A typical measured amplitude decrease of the sound pressure level was observed and explained in details for both blade tip versions for the frequency range f>1000 Hz: appropriate scaling for the blade tip A and for the blade tip B was determined as [omega sup]2.8 and [omega sup]4/3 respectively. Distinctive differences between the two observed frequency spectra were established. Identification of locations, sources and specificity of the generated noise together with their detailed explanation was made possible by measurements of local pressure, velocity and their variances and is supported by simultaneous experimental flow visualization.
Bibliografsko gradivo je bilo uspešno dodano na polico.
Dodajanje bibliografskega gradiva na polico ni uspelo.
Gradivo je že na polici.
Trajna povezava
URL:
Faktor vpliva
Dostop do baze podatkov JCR je dovoljen samo uporabnikom iz Slovenije. Vaš trenutni IP-naslov ni na seznamu dovoljenih za dostop, zato je potrebna avtentikacija z ustreznim računom AAI.
Leto
Faktor vpliva
Izdaja
Kategorija
Razvrstitev
JCR
SNIP
JCR
SNIP
JCR
SNIP
JCR
SNIP
Izberite knjižnično izkaznico:
Baze podatkov,
v katerih je revija indeksirana
Ime baze podatkov
Področje
Leto
Povezave do osebnih bibliografij avtorjev
Povezave do podatkov o raziskovalcih v sistemu SICRIS
Storitev za pridobivanje naslova trenutno ni dostopna, prosimo, poskusite še enkrat.
S klikom na gumb "V redu" boste potrdili zgoraj izbrano prevzemno mesto in dokončali postopek rezervacije.
S klikom na gumb "V redu" boste potrdili zgoraj izbrano prevzemno mesto in naslov za dostavo ter dokončali postopek rezervacije.
S klikom na gumb "V redu" boste potrdili zgoraj izbrani naslov za dostavo in dokončali postopek rezervacije.
Obvestilo
Trenutno je storitev za avtomatsko prijavo in rezervacijo nedostopna. Gradivo lahko rezervirate sami na portalu Biblos ali ponovno poskusite tukaj kasneje.
Citiranje
Funkcionalnost trenutno ni na voljo. Prosimo, poskusite kasneje.
