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Aerothermodynamik. Originalveröffentl. im Springer-Verl., Berlin, 1994

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ISBN: 3937300783 Year: Pages: 189 DOI: 10.5445/KSP/1000003549 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:57
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Das Lehrbuch Aerothermodynamik, das die klassischen Gebiete der Hyperschallaerodynamik mit der Chemie heißer Gase verknüpft, ergänzt den Lehrstoff der Strömungsmechanik-Lehrbuchreihe. Es ist als Vertiefung der strömungsmechanischen Grundlagen für die interessierten Maschinenbaustudenten der höheren Semester und Doktoranden der Graduiertenkollegs verfaßt. Das Lehrbuch beabsichtigt nicht, das Gebiet der Aerothermodynamik umfassend zu behandeln. Es umfaßt die Stoffauswahl einer vom Erstautor über mehr als einem Jahrzehnt gehaltenen Spezialvorlesung, die dem Wissensstand eines Maschinenbaustudenten im 8. Semester angepaßt ist, der erfahrungsgemäß noch keine Berührung mit der Nichtgleichgewichts-Thermodynamik und gaskinetischen Betrachtungsweise der Strömungsmechanik hatte. Die Mitautoren haben im Rahmen ihrer Dissertationen den Vorlesungsstoff weiter vertieft und insbesondere in den numerisch orientierten Kapiteln die neuesten Ergebnisse eingearbeitet. Damit wird auch der im Beruf stehende Ingenieur für seine praktische Projektarbeit in den Hyperschall-Technologieprogrammen und Projekten zahlreiche Anregungen finden können.Der Lehrstoff gliedert sich in Einführungskapitel über die Grundlagen und Eigenschaften von Hyperschallströmungen und die Grundbegriffe der Nichtgleichgewichts-Thermodynamik heißer Gase. Es folgen die Kapitel ""Verdünnte Strömungen"" und ""Kontinuumsströmungen"", in denen den gaskinetischen und kontinuumsmechanischen Grundgleichungen , ausgewählten numerischen Lösungsmethoden und der Modellierung der Luftchemie ein besonders breiter Raum eingeräumt wurde. Das Lehrbuch schließt mit dem Kapitel über einige ausgewählte Hyperschall-Projekte und Technologieprogramme unter Einbeziehung der Versuchsanlagen und Großrechner-Verbundsysteme ab.

Flow control : theoretical concept of absolute instability

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ISBN: 9783866445314 Year: Pages: 97 p. DOI: 10.5445/KSP/1000016554 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
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At the 37th Prandtl memorial lecture on Regions of Viccous Flow, H.Oertel 1994 developed for the first time the stability theory of local perturbations in boundary layers and wake flows, as well as their practical application in the flow control of vehicle flows and the boundary layer of civil aircraft wings.This work presents how the stability theory concept of absolute instability has advanced and proven in practice in the last 15 years in terms of the efficient flow control.

Modelling the human cardiac fluid mechanics

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ISBN: 3937300821 Year: Pages: 49 p. DOI: 10.5445/KSP/1000003551 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
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We present a virtual heart model simulating the flow in the left human ventricle and in the aorta. Because of the lack of in vivo structure data of the human ventricle, the active ventricle movement is given by a time-dependent ventricle model that is derived from in vivo image data of a nuclear spin MRT tomograph of a healthy human heart. The passive part of the virtual heart model consists of a model aorta and vena cava, and of heart valves. As the movement is due to the flow in the inactive region of the heart, a coupling of flow and structure is necessary in the model to take into account the deviation of the aorta and the closing and opening of the heart valves. The flow calculation is performed with a finite volume method, while the structure of the aorta is calculated using the finite element method. The flow resistance of the time simulation in the body is taken into account with a circulation model. In the outlook of the article, we show how the virtual heart model can be used to predict flow losses due to pathological ventricle contraction defects in an unhealthy human heart.

Introduction to fluid mechanics. Originalveröffentl. im Verl. Vieweg, Braunschweig, 2001

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ISBN: 3937300813 Year: Pages: 167 p. DOI: 10.5445/KSP/1000003548 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:02
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This textbook on fluid mechanics is aimed at engineering students at Bachelor's degree level. In Chapter 2 the fundamentals of fluid mechanics, needed for the description and analysis of flows in technology, are presented. One-dimensional stream filament theory, along with the momentum integral and angular momentum integral equations, already present us with one method of constructing fluid technological appliances and experiments. For example, the dimensions of a machine can be determined quite accurately in one first step and predictions made about the flow losses which occur.However, these methods fail when machines are to be optimized, or when appliances are to be developed to operate under extreme conditions, such as silent operation, high efficiency, small dimensions, greatly damped oscillatory behavior, etc. In addition to this, even for most simple cases of application, simple fluid mechanical fundamentals cannot determine the operating behavior of a machine accurately enough. This requires extensive experiments to be carried out and these can be very costly and time consuming.At this point we refer to more detailed textbooks which progress systematically from the fundamental fluid mechanical equations and their methods of solution to the application of fluid mechanical software.The methods used in fluid mechanics are analytical, numerical and experimental. Although numerical methods are increasingly used to replace experimental methods, all three are still needed to solve fluid mechanical problems. This book is restricted to theoretical, that is analytical, methods. After working through this book, students are qualified to understand the basics and phenomena of fluid mechanics, and will have obtained an initial insight into fluid mechanical software, even if further studies into the fundamental equations of fluid mechanics and numerical methods are necessary for the application of this software.The composition of this book is partly very theoretical. In order not to lose sight of the connection to technical applications during the extensive derivations, we have selected flows past airplane wings, flows past vehicles and flows in pipes of process engineering systems as representative examples to illustrate the basics of one-dimensional fluid mechanics.We now introduce the student to the great variety of fluid mechanical applications, demonstrating that flows are all around us in our technological environment, by describing selected examples of flows in the following introductory sections.

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