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RISMeridional Atmospheric Teleconnections Over The North Pacific From 1950 to 1972
Publisher: American Meteorological Society
Abstract: The meridional atmospheric teleconnections over the central North Pacific Ocean during winter are investigated by correlating the year-to-year fluctuations in the convective activity at the Equator, mid-latitude pressure/wind ...
Improved Modeling Capabilities of the Airflow Within Turbine Case Cooling Systems Using Smart Porous Media
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Impingement cooling is commonly employed in gas turbines to control the turbine tip clearance. During the design phase, computational fluid dynamics (CFD) is an effective way of evaluating such systems but for most turbine ...
Merging Conventional (1915–92) and Passive Microwave (1978–2002) Estimates of Snow Extent and Water Equivalent over Central North America
Publisher: American Meteorological Society
Abstract: A detailed evaluation of snow water equivalent (SWE) and snow cover extent (SCE) derived using the combined Scanning Multichannel Microwave Radiometer (SMMR) and Special Sensor Microwave Imager (SSM/I) brightness temperature ...
An Experimental, Aerodynamic Evaluation of Design Choices for a Low-Pressure Compressor Transition Duct
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The S-shaped duct which transfers flow from the low-pressure fan to the engine core in large civil turbofans presents a challenging problem. Aerodynamically it has a spatially and temporarily varying inlet flow combined ...
Experimental Investigation of the Effect of Bleed on the Aerodynamics of a Low-Pressure Compressor Stage in a Turbofan Engine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The compression system in modern turbofan engines is split into stages linked by transition ducts. Downstream of the low-pressure system, a handling bleed is often required and, in conjunction with structural vanes, can ...
Combining SMMR and SSM/I Data for Time Series Analysis of Central North American Snow Water Equivalent
Publisher: American Meteorological Society
Abstract: When Special Sensor Microwave Imager (SSM/I) and Scanning Multichannel Microwave Radiometer (SMMR) data are combined, the time series of dual-polarized, multichannel, spaceborne passive microwave brightness temperatures ...
Influence of Purge Flow Swirl at Exit to the High-Pressure Compressor on OGV/Pre-Diffuser and Combustion System Aerodynamics
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: As aero gas turbine designs strive for ever greater efficiencies, the trend is for engine overall pressure ratios to rise. Although this provides greater thermal efficiency, it means that cycle temperatures also increase. ...
Experimental Investigation of Secondary Flows and Length Reduction for a Low-Pressure Compressor Transition Duct
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The need to reduce fuel-burn and emissions is pushing turbofan engines toward geared architectures with higher bypass ratios and small ultrahigh-pressure ratio cores. However, this increases the radial offset between ...
Aerodynamic Performance of a Coolant Flow Off Take Downstream of an Outlet Guide Vane
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Within the compression system of a gas turbine engine a significant amount of air is removed to fulfill various requirements associated with cooling, ventilation, and sealing. Flow is usually removed through offtakes located ...
Integrated Outlet Guide Vane Design for an Aggressive S Shaped Compressor Transition Duct
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Within gas turbines the ability to design shorter aggressive Sshaped ducts is advantageous from a performance and weight saving perspective. However, current design philosophies tend to treat the Sshaped duct as an isolated ...