10 research outputs found

    Numerical analysis of the flow behavior in the throat section of an experimental conical nozzle

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    The flow pattern in supersonic nozzles is defined by the aerodynamic profiles of the geometry of the internal walls, among other parameters, the throat being a critical section. In the present work, the objective is to analyze the behavior of the flow in the straight section of the throat of an experimental conical nozzle of a solid fuel probe rocket engine. The over-expanded flow was simulated with the ANSYS-Fluent code in a 2D computational domain, using the RANS model and the Menter turbulence model, and the Sutherland equation for viscosity as a function of the temperature. Five case studies were performed for the throat length in the range of 1-10 mm. Fluctuations of Mach number, pressure and temperature, oblique shock waves in the throat section were obtained for the length of 10 mm; for shorter lengths the intensity of the shock magnitude decreased. It is concluded that, for the throat length of 1 mm, the flow is transonic without the presence of oblique shocks. In the diverging section, shock waves vary in intensity and change position

    Measurements of triple-differential cross sections for inclusive isolated-photon+jet events in pp\mathrm{p}\mathrm{p} collisions at s=8TeV\sqrt{s} = 8\,\text {TeV}

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    Measurements of triple-differential cross sections for inclusive isolated-photon+jet events in pp collisions at root s=8 TeV

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    Measurements are presented of the triple-differential cross section for inclusive isolated-photon+jet events in pp collisions at root s = 8 TeV as a function of photon transverse momentum (p(T)(gamma)), photon pseudorapidity (eta(gamma)), and jet pseudorapidity (eta(jet)). The data correspond to an integrated luminosity of 19.7 fb(-1) that probe a broad range of the available phase space, for vertical bar eta(gamma)vertical bar 25 GeV. The measurements are compared to next-to-leading order perturbative quantum chromodynamics calculations, which reproduce the data within uncertainties.Peer reviewe

    Pictavia Aurea

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    Este volumen, titulado Pictavia aurea, reúne 131 estudios que constituyen una granada muestra de los debates y las presentaciones en torno a la cultura hispánica del Siglo de Oro que entre los días 11 y 15 de julio de 2011 se dieron en la ciudad de Poitiers (Francia) en el marco del IX congreso de la Asociación Internacional “Siglo de Oro”. Auspiciada por la Universidad de Poitiers, a través del Centro de Estudios de la Literatura española de Entre Siglos (siglos xvii-xviii) (CELES XVII-XVIII) y el laboratorio «Formes et Représentations en Linguistique et Littérature» (FoReLL), la convocatoria reunió en la ciudad francesa a 276 participantes y a un centenar de asistentes en la novena edición del Congreso de la Asociación, que celebró entonces la efeméride del 450o aniversario del nacimiento de Luis de Góngora.A Isaías Lerner, maestro de la filología hispánic

    Observation of a peaking structure in the J/psi phi mass spectrum from B-+/- -> J/psi phi K-+/- decays

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    A peaking structure in the J/ψφ mass spectrum near threshold is observed in B ±→J/ψφK± decays, produced in pp collisions at √s=7 TeV collected with the CMS detector at the LHC. The data sample, selected on the basis of the dimuon decay mode of the J/ψ, corresponds to an integrated luminosity of 5.2 fb-1. Fitting the structure to an S-wave relativistic Breit-Wigner lineshape above a three-body phase-space nonresonant component gives a signal statistical significance exceeding five standard deviations. The fitted mass and width values are m = 4148.0 ± 2.4 (stat.) ± 6.3 (syst.)MeV and Γ=28-11 +15(stat.)±19(syst.)MeV, respectively. Evidence for an additional peaking structure at higher J/ψφ mass is also reported. © 2014 The Authors

    Measurements of triple-differential cross sections for inclusive isolated-photon + jet events in pp collisions at <tex>\sqrt{s}$</tex>=8 TeV

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    Measurements of triple-differential cross sections for inclusive isolated-photon+jet events in pp\mathrm{p}\mathrm{p} collisions at s=8TeV\sqrt{s} = 8\,\text {TeV}

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    Measurements are presented of the triple-differential cross section for inclusive isolated-photon+jet events in pp\mathrm{p}\mathrm{p} collisions at s=8\sqrt{s} = 8 TeV as a function of photon transverse momentum (p_{\mathrm {T}} ^{{\upgamma {}{}}}), photon pseudorapidity (\eta ^{{\upgamma {}{}}}), and jet pseudorapidity (ηjet\eta ^{\text {jet}}). The data correspond to an integrated luminosity of 19.7fb119.7{\,\text {fb}^{-1}} that probe a broad range of the available phase space, for |\eta ^{{\upgamma {}{}}} | 25\,\text {GeV}. The measurements are compared to next-to-leading order perturbative quantum chromodynamics calculations, which reproduce the data within uncertainties

    Measurements of triple-differential cross sections for inclusive isolated-photon+jet events in p p collisions at √s=8TeV

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    Measurements are presented of the triple-differential cross section for inclusive isolated-photon+jet events in p p collisions at s=8 TeV as a function of photon transverse momentum (pTγ), photon pseudorapidity (ηγ), and jet pseudorapidity (ηjet). The data correspond to an integrated luminosity of 19.7fb-1 that probe a broad range of the available phase space, for | ηγ| &amp;lt; 1.44 and 1.57 &amp;lt; | ηγ| &amp;lt; 2.50 , | ηjet| &amp;lt; 2.5 , 40&amp;lt;pTγ&amp;lt;1000GeV, and jet transverse momentum, pTjet, &amp;gt; 25GeV. The measurements are compared to next-to-leading order perturbative quantum chromodynamics calculations, which reproduce the data within uncertainties. © 2019, CERN for the benefit of the CMS collaboration

    Measurements of the <tex>\Upsilon</tex>(1S),<tex>Υ</tex>(1S), <tex>\Upsilon</tex>(2S), and <tex>\Upsilon</tex>(3S)differentialcrosssectionsinppcollisionsat<tex>s</tex>(3S) differential cross sections in pp collisions at <tex>\sqrt{s}</tex>=7 TeV

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