Results 101 to 110 of about 276,192 (314)
Development of PDC Bit with Axe-shaped Teeth and its Application in East China Sea
Shiyou jixie, 2021 The PDC bits used in many wells in the East China Sea had low ROP and small footage in the process of drilling deep formation. After the bits were pulled out, it was found that the cutting teeth had been worn severely.
Li Qian +5 more
doaj
Computer program to determine the irrotational nozzle admittance [PDF]
, 1973 Irrotational nozzle admittance is the boundary condition that must be satisfied by combustor flow oscillations at nozzle entrance. Defined as the ratio of axial velocity perturbation to the pressure perturbation at nozzle entrance, nozzle admittance can ...
Bell, W. A., Zinn, B. T.
core +1 more source
Advanced Functional Materials, EarlyView.Flow through a nozzle is a common component of most fluid‐based polymer processing techniques such as spray drying, inkjet printing, extrusion. An ultrahigh molecular weight multi‐mechanophore system is used to probe the differences in the distribution of mechanical activation observed between nozzle flow and ultrasonication; the gold standard ...
Niamh Willis‐Fox +4 more
wiley +1 more source
Actuating and Sensing Composites of Liquid Crystal Elastomers and Poly(ionic liquid)s
Advanced Functional Materials, EarlyView.Ionic conductive, mechanically tough, flexible, and stretchable filaments of a composite material comprising a liquid crystal elastomer and a poly(ionic liquid) are produced through 3D printing, which exhibit large actuation strain under stimulation and electrical resistance variation in response to deformation or environmental condition changes. Their
Zeping Liu +6 more
wiley +1 more source
Optimization of Jet Pig Nozzle Type for Gas Pipeline Based on CFD
Shiyou jixie, 2021 In the process of natural gas pipeline transportation, dust and other dirt are easy to adhere to the inner wall of the pipe, which reduces the efficiency of pipeline transmission and affects operation.
Li Yaxi, Tian Yuan, Deng Junzhe
doaj
Pressures measured in flight on the aft fuselage and external nozzle of a twin-jet fighter [PDF]
Fuselage, boundary layer, and nozzle pressures were measured in flight for a twin jet fighter over a Mach number range from 0.60 to 2.00 at test altitudes of 6100, 10,700, and 13,700 meters for angles of attack ranging from 0 deg to 7 deg. Test data were
Davis, R. A. +3 more
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Tissue Engineered Human Elastic Cartilage From Primary Auricular Chondrocytes for Ear Reconstruction
Advanced Functional Materials, EarlyView.Despite over three decades of research, no tissue‐engineered solution for auricular reconstruction in microtia patients has reached clinical translation. The key challenge lies in generating functional elastic cartilage ex vivo. Here, we integrate synergistic cell‐biomaterial strategies to engineer auricular grafts with mechanical and histological ...
Philipp Fisch +13 more
wiley +1 more source
Applied SciencesCurrently, the primary method for controlling red tides in the ocean involves spraying water solutions with special chemicals as solutes. High-pressure spraying results in the formation of typical jet structures.
Bin Zhang +5 more
doaj +1 more source
Nuclear thermal rocket nozzle testing and evaluation program [PDF]
Performance characteristics of the Nuclear Thermal Rocket can be enhanced through the use of unconventional nozzles as part of the propulsion system. The Nuclear Thermal Rocket nozzle testing and evaluation program being conducted at the NASA Lewis is ...
Davidian, Kenneth O. +1 more
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Vented vectoring-nozzle for STOL and V/STOL aircraft [PDF]
, 1974 Vented vectoring-nozzle has superior thrust coefficient and is lighter in weight because it does not require completely enclosed elbow duct ordinarily used to deflect nozzle flow.
Esker, D. W.
core +1 more source