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A Novel Multi-Stage Impingement Cooling Scheme—Part I: Concept Study
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The impingement cooling for a modern gas turbine component, either a combustor liner or a high-pressure turbine blade, is often not as efficient as required due to strong cross-flow effect and coolant maldistribution. This ...
Water Vapor Exchange between Soil and Atmosphere over a Gobi Surface near an Oasis in the Summer
Publisher: American Meteorological Society
Abstract: Using data observed at Dunhuang, in the Gansu, in the arid region of northwest China in the summer, the characteristics of the soil water content, temperature, and atmospheric humidity were analyzed. It was found that the ...
A Novel Multi-Stage Impingement Cooling Scheme—Part II: Design Optimization
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Cross flow and coolant maldistribution are the common design challenges for impingement cooling in modern gas turbine. This paper reports a novel multi-stage impingement cooling scheme for combustor liner. The design concept ...
The Reasons of Heat Transfer Enhancement in a Laminar Channel Flow With Uniform Heat Flux on the Wall Under a Pair of Longitudinal Vortex Generators Mounted on the Bottom Wall
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To find the reasons of heat transfer enhancement of a laminar convective heat transfer process in a channel at a uniform heat flux boundary when a pair of longitudinal vortex generators (VGs) is mounted on the bottom wall, ...
Tropical Cyclone Damages in China 1983–2006
Publisher: American Meteorological Society
Abstract: Based on damage records released by the Department of Civil Affairs of China, direct economic losses and casualties associated with tropical cyclones that made landfall over China during 1983?2006 are examined. In an average ...
Study on Fatigue of Tubing Joint Thread Induced by Vibration in HTHP Ultradeep Wells
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: According to the tubing string failure statistics in the oilfield, fatigue crack of tubing joint thread in high temperature high pressure (HTHP) ultradeep gas wells remains a problem because it can cause tubing strength ...
Residual Strength Evaluation of First-Stage Absorber With Weld Considering Corrosion and Thermal Stress
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The first-stage absorber, which is often used to purify crude oil or highly acidic natural gas, is the core equipment of petrochemical enterprises. Uniaxial strength is checked considering axial stress, hoop stress, and ...
Advanced Flow Control for Supersonic Blowdown Wind Tunnel Using Extended Kalman Filter
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Supersonic blowdown wind tunnels provide controlled test environments for aerodynamic research on scaled models. During the experiments, the stagnation pressure in the test section is required to remain constant. Due to ...
Control of Blow-Down Wind Tunnel Using Combined Extended Kalman and Nonlinear Predictive Filters
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A blow-down wind tunnel is a typical nonlinear time-varying system facing the coupling effects between the pressure and temperature during the short-time test procedure. The control of blow-down wind tunnels has been ...
Increasing Trend of Pan Evaporation over the Semiarid Loess Plateau under a Warming Climate
Publisher: American Meteorological Society
Abstract: n most parts of the world, pan evaporation decreases with increased air temperature rather than increases, which is known as the ?evaporation paradox.? The semiarid Loess Plateau, which is sensitive to global climate change ...