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  • AERODYNAMICS  (1)
  • Chemistry  (1)
  • 1985-1989  (2)
  • 1970-1974
  • 1965-1969
  • 1987  (2)
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  • 1985-1989  (2)
  • 1970-1974
  • 1965-1969
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 553 (1987), S. 239-247 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of elemental Sulfur with Halogenated MethanesAt 250°C a reaction between CCl4 and sulfur forms S2Cl2 and CS2 (besides small amounts of S3Cl2 and S4Cl2). CHCl3 and sulfur above 200°C under catalytic influence of AlCl3 are forming HCl, S2Cl2, and CS2; CH2Cl2 and sulfur also are reacting (with AlCl3 or AI as catalyst) to CS2 and HCl. Only at 345°C one gets,CS2, HCl, and H2S from CH3Cl and sulfur. At 160°C forms HBR,BR2, and CS2. Aluminium is necessary for the reaction of CH2Br2 at 250°C with sulfur, forming CS2 and HBr. A mixture of products (CS2,H2S, HBr, CH3SCH3, and (CH3)3SBr) results from CH3 Br and sulfur at 250°C. CH3I and sulfur produce CS2,I2, and H2S at 145°C. The same products are formed from CH2I2 and sulfur with aluminium as catalyst at 175°C.
    Notes: CCl4 reagiert bei 250°C mit Schwefel zu S2Cl2 und CS2 (neben wenig S3Cl2 und S4Cl2). Aus CHCl3 und Schwefel bilden sich oberhalb 200°C unter AlCl3-Katalyse HCl, S2Cl2 und Cs2. CH2Cl2 und Schwefel liefern (wieder mit AlCl3 bzw. auch Al) CS2 und HCl. CH3Cl reagiert mit Schwefel erst oberhalb 345°C zu CS2, HCl und H2S. CBr4erst ab 245°C mit Schwefel zu HBR, Br2un 1 CS2 umsetzt. CH2BR2 benötigt bei 250°C wieder Aluminium als Katalysator, um mit Schwefel CS2 und HBr zu bilden. CH3Br reagiert mit Schwefel bei 250° zu einem nicht genau definierten Produktgemisch aus CS2, H2S, HBr, Ch3SCH3 und (CH3)3 SBr. Aus CHI3 und Schwefel erhält man bei 145°C CS2,i2 undH2S, ebenso wie aus CH2I2 und Schwefel, allerdings nur unter Aluminiumkatalyse bei 175°C.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2019-07-27
    Description: An experimental investigation of developing flows through a combination of out-of-plane S-bend ducts was conducted to gain insight into the redirection of flow in geometries similar to those encountered in practical aircraft wing-root intake ducts. The present double S-bend was fabricated by placing previously investigated S-ducts and S-diffusers in series and with perpendicular planes of symmetry. Laser-Doppler anemometry was employed to measure the three components of mean velocity, the corresponding rms quantities, and Reynolds stresses in the rectangular cross-section ducts. Due to limited optical access, only two mean and rms velocity components were resolved in the circular cross-section ducts. The velocity measurements were complemented by wall static pressure measurements. The data indicates that the flows at the exit are complex and asymmetric. Secondary flows generated by the pressure field in the first S-duct are complemented or counteracted by the secondary flows produced by the area expansion and the curvature of the S-diffuser. The results indicate the dominance of the inlet conditions and geometry upon the development of secondary flows and demonstrate that the flows are predominantly pressure-controlled. The pressure distribution caused by the duct geometry determines the direction and magnitude of the bulk flow while the turbulence dictates the mixing characteristics and profiles in the near wall region.
    Keywords: AERODYNAMICS
    Type: Symposium on Turbulent Shear Flows; Sept. 7-9, 1987; Toulouse; France
    Format: text
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