Temat: helicopter rotor - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Numerical simulation of model helicopter rotor in hover
Autorzy:: Doerffer, P.
Szulc, O.
Powiązania:: https://bibliotekanauki.pl/articles/1943245.pdf
Data publikacji:: 2008
Wydawca:: Politechnika Gdańska
Tematy:: transonic
hover
helicopter rotor
Opis:: The article presents details of a URANS simulation of the flow field near a hovering model of the Caradonna and Tung (1981) helicopter rotor [1]. The CFD code SPARC [2] proves to be capable of capturing the aerodynamics of a two-bladed rotor in high-speed transonic hover conditions. A comparison of the simulation results with the experimental data is acceptable, hence the described methodology might be used with confidence in future numerical studies of application of noise-reducing devices on helicopter blades.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2008, 12, 3-4; 227-236
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Time-accurate simulation of flow past PZL W-3A "Sokół" (Falcon) helicopter main rotor in forward flight
Autorzy:: Szulc, O.
Doerffer, P.
Żółtak, J.
Małecki, J.
Powiązania:: https://bibliotekanauki.pl/articles/1933943.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Gdańska
Tematy:: helicopter rotor
forward flight
chimera overlapping grid
Opis:: The paper presents the results of numerical simulations based on the URANS approach and the chimera overlapping grids technique of the main PZL W-3A "Sokół" (Falcon) helicopter rotor in forward flight conditions. The low-speed flight case models the helicopter rotor as parallel to the ground keeping forward speed of approximately 99km/h. Strong Blade-Vortex Interaction (BVI) is responsible for a high level of vibration and noise. The high-speed (266km/h) case reveals two main problems of modern helicopters: compressibility effects due to strong shock-wave boundary layer interaction on the advancing side and separation leading to a dynamic stall on the retreating side of the rotor. An attempt is made to correlate the results of the simulations with the very limited flight test data.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2013, 17, 1-2; 43-61
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Numerical analysis of high-speed impulsive (HSI) noise of PZL W3-A "Sokół" (Falcon) helicopter main rotor in forward flight
Autorzy:: Szulc, O.
Doerffer, P.
Tejero, F.
Żółtak, J.
Małecki, J.
Powiązania:: https://bibliotekanauki.pl/articles/1938632.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Gdańska
Tematy:: aerodynamics
CFD
forward flight
helicopter rotor
HSI noise
shock wave
Opis:: The paper presents the results of a numerical simulation of the flow and acoustic field generated by the PZL W3-A “Sokół” (Falcon) helicopter main roto in high-speed forward flight conditions based on the URANS approach and the chimera overlapping grids technique. A refined CFD model (40+ million of control volumes, 600+ blocks chimera mesh) was designed to resolve the flow-field together with the low-frequency content of the acoustic pressure spectrum in the near-field of the rotor blades to allow high-speed impulsive (HSI) noise prediction. Detailed 3D data was recorded for one rotor revolution (approx. 3 TB) allowing exceptional insight into the physical mechanisms initiating the occurrence and development of the HSI noise phenomenon.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2015, 19, 2; 181-196
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Passive control of shock wave applied to helicopter rotor high-speed impulsive noise reduction
Autorzy:: Doerffer, P.
Szulc, O.
Powiązania:: https://bibliotekanauki.pl/articles/1943208.pdf
Data publikacji:: 2010
Wydawca:: Politechnika Gdańska
Tematy:: shock wave
passive control
perforated wall
transpiration
helicopter rotor in hover
high-speed impulsive noise
Opis:: A strong, normal shock wave, terminating a local supersonic area on an airfoil (or a helicopter blade), not only limits the aerodynamic performance, but also becomes a source of High-Speed Impulsive (HSI) noise. The application of a passive control system (a cavity covered by a perforated plate) on a rotor blade should reduce the noise created by the moving shock. This article describes numerical investigations focused on the application of a passive control device on a helicopter blade in high-speed transonic hover conditions to weaken the shock wave – the main source of HSI noise.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2010, 14, 3; 297-305
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Transonic flows, shock wave-turbulent boundary layer interaction
Autorzy:: Doerffer, P.
Kaczyński, J.
Powiązania:: https://bibliotekanauki.pl/articles/1953982.pdf
Data publikacji:: 1998
Wydawca:: Politechnika Gdańska
Tematy:: transonic flows
shock waves
turbulent boundary layer interaction
computational fluid dynamics CFD
CFD
flow configurations
profile flow
helicopter rotor
hovering
forward flight
internal flows
Opis:: Shock wave-boundary layer interaction is one of the most important phenomenon in transonic flows. Due to its complexity it is difficult as well for experimental as for numerical study. The growing potential of CFD is therefore of great importance. Different aspects of shock wave-boundary layer interaction should be studied in different flow configurations. Therefore results concerning profile flow, helicopter rotor at hovering and forward flight and internal flows are presented in this paper. These are to illustrate our ability in CFD in general. Besides flow simulation the development of codes is carried out.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 1998, 2, 2; 271-286
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

Artykuł

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