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A Turbomachinery Engineer's Summer Vacation

by Mark R. Anderson on Jul 26, 2018 1:48:21 PM

This year's ASME Turbo Expo in Norway inspired me to tack on a vacation to explore European cities on my bucket list. Being an engineer, and student of ancient cultures, part of my trip included visiting Roman ruins in Cologne, Vienna, and Budapest. Looking at these fascinating sites and seeing first-hand their mastery of the handling of both air and water made me rethink the notion that control and distribution of fluid is a strictly modern invention. 

Topics:

The Slip Factor Model for Axial, Radial, and Mixed-Flow Impellers

by Mark Anderson and Chanaka Mallikarachchi on Jul 20, 2018 10:00:25 AM

Ideally, the exit flow angle for an impeller should be the same as the exit blade metal angle. However, the exit flow angle deviates from the blade guidance at the impeller exit due to the finite number of blades. Correctly predicting flow deviation is a critical task in meanline and through-flow modeling because the exit flow angle is directly related to the work input and the pressure rise across the impeller.

Engine-Driven Compressor for Maintaining Aircraft Cabin Pressure

by Dan Hinch on Jul 11, 2018 12:27:47 PM

Commercial and military aircraft require that preset levels be maintained for aircraft cabin pressure, airflow, temperature, and humidity — regardless of flight altitude and aircraft speed. To satisfy these requirements, some amount of the airflow is typically removed from a bleed port located in a compressor section of the main engine, and the air pressure is adjusted to a preset level (through a pressure loss device) before it goes into the cabin. A better, and more effective, way to maintain the cabin environment over all of the aircraft’s operating conditions is to use a dedicated compressor driven by the main engine. Both the main-engine bleed system and the engine-driven compressor (EDC) need an environment control system to maintain cabin temperature and humidity.

Avoiding the "Bad Day" in Aerospace

by Francis A. Di Bella, P.E. on Jul 6, 2018 9:17:04 AM

The AS9100 Certification identifies companies who have qualified to manufacture products for the Aerospace Industry.  Manufacturers who meet the extensive requirements of the AS9100 Certification have committed to maintaining quality assurances that ensure that their products are engineered, manufactured and maintained to provide the aerospace customer with a quality product. 

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