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Congrès International d'Architecture Moderne

About: Congrès International d'Architecture Moderne is a based out in . It is known for research contribution in the topics: Boundary value problem & Jet (fluid). The organization has 393 authors who have published 403 publications receiving 4104 citations.


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Proceedings ArticleDOI
10 May 2011
TL;DR: In this article, a three-stage axial fan with transonic blading was designed for (≈ 3.5:1) pressure ratio and a prototype low pressure compressor module was instrumented with pulsating pressure transducers on the casing in addition to the strain gauging of 1R, 2R rotor blades.
Abstract: A prototype three stage axial fan was designed for (≈ 3.5:1) pressure ratio with transonic blading. Initial tests had shown the symptoms of flutter at part speed even at ISA-SLS inlet conditions. The intensity of flutter became severe at higher inlet P and T conditions. The fan was modified with casing treatment on the first stage of rotor casing area. The test results have exhibited encouraging results. During the process of testing, in order to validate the mathematical model for flutter, the prototype low pressure compressor module was instrumented with pulsating pressure transducer on the casing in addition to the strain gauging of 1R, 2R rotor blades and 1S, 2S stator blades in the low pressure compressor. The results so obtained were analyzed and compared with strain data captured during the same testing. This pulsation data was in full agreement with strain data and also with the mathematical model developed earlier for detection of flutter and rotating stall. It is evident that the mathematical model results and the results obtained during the LPC test to measure flutter and rotating stall component are comparable and thus validated the model. This paper brings out the test preparation of module, preparation of the test stand, online monitoring of data, express analysis of test results and study of the same to exhibit the match with mathematical model of the Aerodynamic phenomena.

1 citations

Journal ArticleDOI
TL;DR: In this article, the acceleration and deceleration of plane-parallel and axisymmetric flows of an ideal (inviscid and non-heat-conducting) gas with a straight sonic line are studied.
Abstract: Features of plane-parallel and axisymmetric flows of an ideal (inviscid and non-heat-conducting) gas with a straight sonic line are studied. The flows under study occur in symmetric and asymmetric plane nozzles and axisymmetric nozzles with circular and annular cross sections. The acceleration and deceleration of flows when a straight sonic line is approached or receded from are studied. Additionally, sonic streamlines are constructed, including a contour of a sonic central body, i.e., a sonic streamline starting at the point of a straight sonic line on the axis of symmetry. The capabilities of the developed approaches are illustrated by examples, which are of interest in themselves.

1 citations

Journal ArticleDOI
01 Jul 2003
TL;DR: In this article, the authors considered the two-fluid hydrodynamic model of Newtonian dark matter as a gaseous electrical and gravitational continuous medium, and studied the whole range of exact solutions for the dark matter equations system.
Abstract: The paper considers the two-fluid hydrodynamic model of Newtonian dark matter as a gaseous electrical and gravitational continuous medium. The whole range of exact solutions for the Newtonian dark matter equations system is studied. Here many exact solutions have soliton-like structure similar to the known soliton solutions in the plasma physics. These solutions can explain the gamma-ray burst propagation and their afterglow. Other particle-like solutions simulate the ultra-high energy cosmic rays. The paper presents some results for the cosmic jets simulations and shows peculiarities of their propagation.

1 citations

22 Apr 2016
TL;DR: In this paper, the potencial productivo of the sorghum bicolor (L.) Moench was investigated in the Galician coastal area, where five different varieties were tested and two varieties with the highest dry matter (DM) yields were selected.
Abstract: RESUMEN El ensilado de sorgo puede ser una buena alternativa al del maiz para la alimentacion de vacas de leche en areas donde el riesgo de sequia estival sea alto. Con el proposito de determinar el potencial productivo del sorgo (Sorghum bicolor (L.) Moench) en las condiciones de secanos humedos de la zona costera de Galicia, se evaluaron cinco variedades comerciales sembradas a mediados de junio como cultivo de verano. La cosecha se realizo en seis fechas diferentes, desde mediados de agosto hasta finales de octubre de 2012, a intervalos quincenales. La produccion de materia seca (MS) por hectarea vario entre variedades en todos los cortes, oscilando en el ultimo corte entre 4,6 y 8,4 t/ha de MS. Los contenidos en proteina bruta (PB) y fibra neutro detergente (FND) se vieron afectados por la variedad y el momento de corte. Promediando todas las variedades, los valores de PB variaron entre el 19,1 % (primer corte) y el 10,0 % (ultimo corte) y los de FND entre el 53,8 % y 53,7 % respectivamente. El segundo ano se ensayaron las dos variedades que obtuvieron mejores resultados, ‘Ascoli’ y ‘Alfa’, con el objetivo de evaluar el rendimiento y la calidad del forraje. Con la variedad ‘Ascoli’ se obtuvo la mayor produccion, los valores inferiores en el contenido en fibra acido detergente, FND y carbohidratos solubles en agua, mientras que su contenido en almidon fue mayor. Las dos variedades estudiadas no mostraron diferencias significativas en cuanto a la digestibilidad in vivo e ingestibilidad. ABSTRACT Sorghum silage can be a good alternative to forage maize to feed dairy cows in areas where the risk of summer drought is high. Sorghum (Sorghum bicolor (L.) Moench) was tested to determine its yield under no irrigated conditions in temperate climate at Galician coastal area. Five different varieties were tested, which were sown at mid-June and harvested in six different dates since mid-August till late October every fifteen days. Dry matter (DM) yield per hectare in the last cut was between 4.6 and 8.4 t DM/ha. Crude protein (CP) and neutral detergent fibre (NDF) contents differed depending on variety and harvest date. Mean CP content varied from 19.1 % at first harvest to 10.0 % at the last one, while NDF content varied between 53.8 % and 53.7 % at first and last cut. In the following year, two varieties with the highest DM yields were selected, so “Ascoli” and “Alfa” were sown to test their yield and forage quality. The variety “Ascoli” showed better results in terms of DM yield per hectare, lower contents in NDF, acid detergent fibre and water soluble carbohydrates, and higher starch percentage. “In vivo” trials were made with both varieties and no significant difference in terms of DM digestibility and intake were found. Both varieties showed a good performance as fodder for dairy cattle.

1 citations

Journal ArticleDOI
TL;DR: In this paper, the structure functions in homogeneous isotropic turbulences are numerically investigated and the methods for constructing the compressible turbulence are analyzed for both one-dimensional and three-dimensional turbulence.
Abstract: The structure functions in homogeneous isotropic turbulence are numerically investigated. Both one-dimensional and three-dimensional turbulences are considered. The methods for constructing the compressible turbulence are analyzed.

1 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202123
202034
201923
201826
201720
201636