Accession Number : AD0272010

Title :   CONTROL OF CIRCULATION AROUND A CIRCULAR CYLINDER

Corporate Author : COMPAGNIE DE RECHERCHES ET D'ETUDES AERONAUTIQUES PARIS (FRANCE)

Personal Author(s) : BROCARD,JEAN

Report Date : 20 DEC 1961

Pagination or Media Count : 1

Abstract : D-272 01034N3 AD-272 009Div. 4 U (TISTM/EJH) OTS price $3.60 Birkbeck Coll. (Gt. Brit.). ALKYL AND ARYL DERIVATIVES OF THE PHOSPHONITRILIC HALIDES. Final technical status rept., 1 Nov 60-31 Oct 61, by R. A. Shaw. 31 Oct 61, 29p. 22 refs. (Contract DA 91-591-EUC-1598) Unclassified report DESCRIPTORS: (Heterocyclic compounds, Poly cyclic compounds, Benzenes, Alkyl radicals, *Phosphorus compounds, *Nitrogen compounds, *Nitrides, *Phosphonitrile chlorides, Synthe sis, Chemical reactions, Friedel-crafts re actions, Boron compounds, Fluorides, Polymeri zation, Butyl radicals, Lithium compounds.) (Toluenes, Xylenes, Polymers.) *Metalorganic compounds, Halides. Identifiers: Phosphazenes. The Friedel-Crafts reaction involving chlorophosphazenes, aluminum chloride, and aromatic hydrocarbons is discussed. Isomeric mixtures of compositions more or less approximating to diand tetra-tolyl, and di- and tetraxylyl were prepared. Starting from the diphenyl derivative, N3P3Ph2Cl4, a diphenyltetratolyl derivative was prepared, N3P3Ph2(tolyl)4, again as a mixture of isomers. A 1:1 adduct between BF3 and hexaethylaminocyclotriphosphazatriene was prepared. Preliminary work was carried out on the FriedelCrafts reaction involving octachlorocyclotetraphosphazene. Further work was carried out on the reaction between chlorophosphazenes and BuLi. Depending on the ratio of the two reactants, polymers of different molecular weights were obtained. (Author)

Descriptors :   *CYLINDRICAL BODIES, *FLUID MECHANICS, BOUNDARY LAYER CONTROL, MODEL BASINS, WIND TUNNELS

Distribution Statement : APPROVED FOR PUBLIC RELEASE