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Influence of Purge Flow on Performance of an End Wall Profiled Turbine

Автор:   Peter S.
мягкая обложка
184 страниц
2010 год
Издательство:   Книга по Требованию
Цена:
3618 руб
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Описание:Resulting in the strongest injection jets and therefore in more induced vorticity. In this work end wall profiling is applied to the first stage of a high work, 1. 5 stage, unshrouded turbine. The two designs increased the total-to-total efficiency by 1% and 0. 3% respectively relative to a baseline efficiency of already 91%. The first end wall design having the highest efficiency without purge flow shows the highest efficiency drop of 1. 2% per injected massflow percent if purge flow is applied. The second end wall design and the baseline case show comparable sensitivities with -0. 7%/% and -0. 6%/% to purge flow. The reason for the increased sensitivity of the first design is an increased circumferential pressure gradient at the first vane rim compared to the baseline case and the second end wall design. The goal of this study is the investigation of the promising secondary flow control technique of non-axisymmetric end wall profiling in a more engine representative environment. Without purge flow non-axisymmetric end wall profiling has demonstrated a considerable increase of total-to-total efficiency.


Orthomol Immun Junior Сила иммунитета на страже Вашего ребенка Orthomol Immun Junior Сила иммунитета на страже Вашего ребенка

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The World is Flat

And so 24/7/365 we are all working. And all this has happened in the twinkling of an eye-the span of the last two or three years.” Genesis: The Flat World Platform Emerges We need to stop here and take stock, because at this point-the mid-1990s-the platform for the flattening of the world has started to emerge. First, the falling walls, the opening of Windows, the digitization of content, and the spreading of the Internet browser seamlessly connected people with people as never before. Then work flow software seamlessly connected applications to applications, so that people could manipulate all their digitized content, using computers and the Internet, as never before. When you add this unprecedented new level of people-to-people communication to all these Web-based application-to-application work flow programs, you end up with a whole new global platform for multiple forms of collaboration. This is the Genesis moment for the flattening of the world. This is when it started to take shape. It would take more time to converge and really become flat, but this is the moment when people started to feel that something was changing ...»

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Фломастеры "631", 50 цветов.
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