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Book Description
CETTE THESE S'INSCRIT DANS UN PROGRAMME DU CNES SUR LA SECURITE DE FONCTIONNEMENT DES MOTEURS A HYDRAZINE D'ARIANE 5. L'OBJECTIF ETAIT DE DETERMINER LES CONDITIONS D'EXPLOSION DE L'HYDRAZINE LIEES A LA PRESENCE DE BULLES DANS LE LIQUIDE. LA PREMIERE PARTIE EST CONSACREE A LA MODELISATION CINETIQUE DE LA DECOMPOSITION THERMIQUE DE L'HYDRAZINE EN PHASE GAZEUSE EN PRESENCE DE DILUANT. LA REACTION DERRIERE UNE ONDE DE CHOC REFLECHIE A ETE ANALYSEE PAR SPECTROMETRIE D'ABSORPTION ENTRE 1100 ET 1400 K POUR DES PRESSIONS COMPRISES ENTRE 200 ET 1350 KPA. L'INFLUENCE DE LA NATURE DU DILUANT (N#2, HE) ET CELLE D'ADDITIFS (H#2, NH#3) SUR LA VITESSE DE REACTION ONT PERMIS DE VALIDER UN MODELE CINETIQUE DETAILLE COMPORTANT 48 ETAPES ET 11 ESPECES. LA SECONDE PARTIE CONCERNE L'ANALYSE DU COMPORTEMENT D'UNE BULLE, PIEGEE DANS L'EAU ET AU CONTACT D'UNE PAROI, PAR IMAGERIE RAPIDE (27000 IMAGES S#-#1). LA BULLE EST SOUMISE A UNE COMPRESSION INITIEE PAR UNE ONDE DE CHOC REFLECHIE SUR UNE MEMBRANE SEPARANT LE LIQUIDE DU TUBE A CHOC. ELLE EST CONSTITUEE D'UN MELANGE STOECHIOMETRIQUE D'ETHYLENE/OXYGENE, DILUE DANS L'ARGON OU L'AZOTE, DONT LES PROPRIETES THERMODYNAMIQUES ET LES TEMPS CARACTERISTIQUES DE REACTION SONT PROCHES DE CELLES DES MELANGES HYDRAZINE/DILUANT. LE VOLUME DE LA BULLE EST COMPRIS ENTRE 100 ET 1000 MM#3. L'ETUDE DE LA DEFORMATION DE LA BULLE MONTRE QUE L'INTERFACE GAZ/LIQUIDE EST CONSERVEE PENDANT LA PREMIERE PHASE DE COMPRESSION PUIS ELLE SE DETERIORE PROGRESSIVEMENT DANS LA PHASE D'EXPANSION. L'ANALYSE DE LA VARIATION DE LA PRESSION AU VOISINAGE DE LA BULLE PERMET DE JUSTIFIER LE MODELE DE LA COMPRESSION ADIABATIQUE PENDANT CETTE PHASE POUR DES BULLES DE VOLUMES DE L'ORDRE OU SUPERIEURS A 100 MM#3. L'EXPLOSION EST OBSERVEE LORSQUE LE DELAI D'INFLAMMATION EST INFERIEUR AU TEMPS CORRESPONDANT A LA PREMIERE PHASE DE COMPRESSION DE LA BULLE. SUR LES BASES DE CES RESULTATS SONT DISCUTES LES RISQUES D'EXPLOSION DE L'HYDRAZINE LIQUIDE SOUMISE A UNE COMPRESSION RAPIDE PROCHE DE CELLE D'UTILISATION DES SYSTEMES DE CONTROLE D'ATTITUDE (SCA)
Book Description
CETTE THESE S'INSCRIT DANS UN PROGRAMME DU CNES SUR LA SECURITE DE FONCTIONNEMENT DES MOTEURS A HYDRAZINE D'ARIANE 5. L'OBJECTIF ETAIT DE DETERMINER LES CONDITIONS D'EXPLOSION DE L'HYDRAZINE LIEES A LA PRESENCE DE BULLES DANS LE LIQUIDE. LA PREMIERE PARTIE EST CONSACREE A LA MODELISATION CINETIQUE DE LA DECOMPOSITION THERMIQUE DE L'HYDRAZINE EN PHASE GAZEUSE EN PRESENCE DE DILUANT. LA REACTION DERRIERE UNE ONDE DE CHOC REFLECHIE A ETE ANALYSEE PAR SPECTROMETRIE D'ABSORPTION ENTRE 1100 ET 1400 K POUR DES PRESSIONS COMPRISES ENTRE 200 ET 1350 KPA. L'INFLUENCE DE LA NATURE DU DILUANT (N#2, HE) ET CELLE D'ADDITIFS (H#2, NH#3) SUR LA VITESSE DE REACTION ONT PERMIS DE VALIDER UN MODELE CINETIQUE DETAILLE COMPORTANT 48 ETAPES ET 11 ESPECES. LA SECONDE PARTIE CONCERNE L'ANALYSE DU COMPORTEMENT D'UNE BULLE, PIEGEE DANS L'EAU ET AU CONTACT D'UNE PAROI, PAR IMAGERIE RAPIDE (27000 IMAGES S#-#1). LA BULLE EST SOUMISE A UNE COMPRESSION INITIEE PAR UNE ONDE DE CHOC REFLECHIE SUR UNE MEMBRANE SEPARANT LE LIQUIDE DU TUBE A CHOC. ELLE EST CONSTITUEE D'UN MELANGE STOECHIOMETRIQUE D'ETHYLENE/OXYGENE, DILUE DANS L'ARGON OU L'AZOTE, DONT LES PROPRIETES THERMODYNAMIQUES ET LES TEMPS CARACTERISTIQUES DE REACTION SONT PROCHES DE CELLES DES MELANGES HYDRAZINE/DILUANT. LE VOLUME DE LA BULLE EST COMPRIS ENTRE 100 ET 1000 MM#3. L'ETUDE DE LA DEFORMATION DE LA BULLE MONTRE QUE L'INTERFACE GAZ/LIQUIDE EST CONSERVEE PENDANT LA PREMIERE PHASE DE COMPRESSION PUIS ELLE SE DETERIORE PROGRESSIVEMENT DANS LA PHASE D'EXPANSION. L'ANALYSE DE LA VARIATION DE LA PRESSION AU VOISINAGE DE LA BULLE PERMET DE JUSTIFIER LE MODELE DE LA COMPRESSION ADIABATIQUE PENDANT CETTE PHASE POUR DES BULLES DE VOLUMES DE L'ORDRE OU SUPERIEURS A 100 MM#3. L'EXPLOSION EST OBSERVEE LORSQUE LE DELAI D'INFLAMMATION EST INFERIEUR AU TEMPS CORRESPONDANT A LA PREMIERE PHASE DE COMPRESSION DE LA BULLE. SUR LES BASES DE CES RESULTATS SONT DISCUTES LES RISQUES D'EXPLOSION DE L'HYDRAZINE LIQUIDE SOUMISE A UNE COMPRESSION RAPIDE PROCHE DE CELLE D'UTILISATION DES SYSTEMES DE CONTROLE D'ATTITUDE (SCA)
Author: Eckart Walter Schmidt Publisher: John Wiley & Sons ISBN: 0471415537 Category : Science Languages : en Pages : 868
Book Description
A new edition of the authoritative source on hydrazine chemistry In the past century, hydrazine, an important intermediate in the synthesis of countless chemicals with N-N bonds, has grown into a major industrial commodity with a wide range of uses. It is used as a fuel in rocket propulsion, as a boiler feedwater deoxygenating agent, and in the manufacture of foamed plastics, pharmaceuticals, and biodegradable pesticides and herbicides, to name just a few uses. Since the first edition of Hydrazine and Its Derivatives: Preparation, Properties, Applications was published in 1984, there has been considerable development in this field and many new aspects of hydrazine chemistry and applications have evolved. Offering an overview of hydrazines and their industrial applications, this book also provides a compilation of numerous references to the scientific and technical literature arranged in a systematic manner, allowing the reader to find the necessary information by accessing the pages either from the table of contents or the alphabetical subject index. Some other features of the significantly enlarged Second Edition include: Frequent "see also" cross-references/links to other relevant sections of the bookOver 8,400 references, most of which cover the period from 1980 to 1998 Extremely thorough, encyclopedia-style coverage of topics Information to aid in the design of environmentally benign, biodegradable pesticides and more energetic rocket propellants Background information on the adverse effects of pesticide residue in food Hydrazine and Its Derivatives: Preparation, Properties, Applications, Second Edition is the most comprehensive book ever published on hydrazines, and this new edition is indispensable reading material for chemists, toxicologists, environmentalists, propulsion engineers, materials engineers, and satellite builders.
Author: Victor O. Sheftel Publisher: CRC Press ISBN: 148229382X Category : Technology & Engineering Languages : en Pages : 1321
Book Description
More foods are now packaged in containers designed for direct cooking or heating, which encourages movement of substances into the foods. Indirect Food Additives and Polymers: Migration and Toxicology is an impressive review of basic regulatory, toxicological, and other scientific information necessary to identify, characterize, measure, and predict the hazards of nearly 2,000 of the plastic-like materials employed in packaging and identified by the FDA as indirect food additives. It presents the data underlying federal regulations, previously unavailable in one volume, and is a convenient resource for anyone working in the large number of related disciplines.
Author: Alan E. Waltar Publisher: Springer Science & Business Media ISBN: 1441995722 Category : Technology & Engineering Languages : en Pages : 717
Book Description
This book is a complete update of the classic 1981 FAST BREEDER REACTORS textbook authored by Alan E. Waltar and Albert B. Reynolds, which , along with the Russian translation, served as a major reference book for fast reactors systems. Major updates include transmutation physics (a key technology to substantially ameliorate issues associated with the storage of high-level nuclear waste ), advances in fuels and materials technology (including metal fuels and cladding materials capable of high-temperature and high burnup), and new approaches to reactor safety (including passive safety technology), New chapters on gas-cooled and lead-cooled fast spectrum reactors are also included. Key international experts contributing to the text include Chaim Braun, (Stanford University) Ronald Omberg, (Pacific Northwest National Laboratory, Massimo Salvatores (CEA, France), Baldev Raj, (Indira Gandhi Center for Atomic Research, India) , John Sackett (Argonne National Laboratory), Kevan Weaver, (TerraPower Corporation) ,James Seinicki(Argonne National Laboratory). Russell Stachowski (General Electric), Toshikazu Takeda (University of Fukui, Japan), and Yoshitaka Chikazawa (Japan Atomic Energy Agency).
Author: Linda Strande Publisher: IWA Publishing ISBN: 1780404735 Category : Technology & Engineering Languages : en Pages : 428
Book Description
It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Author: CHRISTELLE.. BOURGEOIS HALAT
Author: CHRISTELLE.. BOURGEOIS HALAT
Author: Eckart Walter Schmidt
Author: Roland-Paul Delahaye
Author: Hans Georg Wiedemann
Author: Victor O. Sheftel
Author: Alan E. Waltar
Author: Martin Summerfield
Author: F L A M I N I O FIDANZA
Author: Linda Strande
Author: AGARD.