Results 71 to 80 of about 387,967 (213)
Journal of Industrial Design and Engineering Graphics, 2011 The objective of this paper is to analyze the role of helicopter rotor, to classify them by type, and to imagine new types of helicopter rotors that can equip future helicopters.
IONESCU Cristian Andrei
doaj
Energy Science &Engineering, EarlyView.Turbulence intensity from 1% to 25% was parametrically tested on a three‐bladed H‐type Darrieus rotor across five tip speed ratios (TSRs) using two‐dimensional URANS. The optimal TSR proved the most efficient and most robust operating point simultaneously, with Cp losses capped at 5.8% even at TI = 25%. ABSTRACT The effect of inlet turbulence intensity
Aydin Ulus
wiley +1 more source
Energy Science &Engineering, EarlyView.Three‐turbine guided Savonius arrays installed along highway corridors extract up to 697 J under multi‐vehicle wake conditions when spaced 12 rotor diameters apart—68% more than compact arrangements. Guide vanes boost output by 80–120%, and interior turbines respond most strongly to spacing, governing overall array performance. ABSTRACT Highway‐induced
Aydin Ulus, Stefan Ilie Moldovan
wiley +1 more source
A Straight-bladed Vertical Axis Wind Turbine with a Directed Guide Vane Row
Journal of Fluid Science and Technology, 2008 A straight-bladed vertical axis wind turbine with a directed guide vane row has been proposed in order to enhance its torque. The experimental study of the proposed wind turbine was carried out by a wind tunnel with an outlet diameter of 1.8m. The tested
Manabu TAKAO +4 more
doaj +1 more source
International Journal of Cancer, EarlyView.ABSTRACT Whether combining pretreatment plasma Epstein–Barr virus DNA (EBV‐DNA) with 18F‐FDG PET/CT‐derived total lesion glycolysis (TLG) improves prognostic stratification in nonmetastatic nasopharyngeal carcinoma (NPC) is unclear, particularly in nonendemic populations.
Mehmet Çağrı Duymaz +7 more
wiley +1 more source
Green Maintenance Technology for Large Area Damage of Composite Tail Rotor Blade
Engineering ProceedingsBased on the analysis of the damage location, damage size, product layering structure, and internal filling structure of the composite tail rotor blade, the damage maintenance technical scheme was initially determined.
Miao Ren, Qidi Liu, Nan Lv, Lili Li
doaj +1 more source
Dissecting the angiogenic mechanism of pachychoroid polypoidal choroidal vasculopathy
iMeta, EarlyView.A prognosis‐oriented classification system was established to distinguish Pachy PCV from Non‐pachy PCV using a large multicenter dataset. Comparative plasma multi‐omics profiling of Pachy PCV, Non‐pachy PCV, and normal controls revealed unique upregulation of the fluid shear stress and atherosclerosis (FSS‐AS) and HIF‐1 signaling pathways in Pachy PCV.
Xinyu Zhao +18 more
wiley +1 more source
Numerical simulation of the coupled flow field in helicopter/tanker interaction
Kongqi donglixue xuebaoTo investigate the aerodynamic interference caused by tanker wake on helicopter during aerial refueling, a numerical simulation method for the coupled flow field of tanker and helicopter based on the Reynolds-Averaged Navier-Stokes (RANS) equations is ...
Xikang Dai +3 more
doaj +1 more source
Interdisciplinary Medicine, EarlyView.Vaginal microbiota‐derived secretory factors enhance the regenerative capacity of human endometrial stem cells by upregulating VCAM1 and activating PI3K/Akt signaling. This microbiota–stem cell crosstalk promotes self‐renewal, migration, multilineage differentiation, and metabolic reprogramming in vitro and in vivo, establishing a novel microbiota ...
Soo‐Rim Kim +6 more
wiley +1 more source
DLR’s S4 Rotor Code Validation With HART II Data: The Baseline Case [PDF]
, 2007 S4 is the name of DLR’s high resolution rotor code for simulation of aerodynamics, dynamics, acoustics and flow field of isolated rotors like those being operated in the wind tunnel.
van der Wall, Berend G., Yin, Jianping
core