Publications (365)
COMMUNICATION
DÉTERMINATION DES VITESSES DE ROTATION DES ÉTOILES DE TYPE FGK DANS LE CADRE DU PROJET AMBRE
BADO Fabrice, KAM Sié Zacharie, De LAVERNY Patrick, BADOLO Nekolgne Aymard, KOULIDIATI Jean
Il n’y a à l’heure actuelle très peu de catalogues de vitesse de rotation (Vsini) pour les étoiles FGK et leurs propriétés de rotation sont encore mal connues. Le but est de créer un catalogue de Vsini pour plusieurs milliers d’étoiles FGK à partir de spectres haute résolution collectés au sol dans le cadre du projet AMBRE. Dans un premier tem(...)
etoiles FGK, Correlation croisee, vitesse de rotation, projet AMBRE
COMMUNICATION
RECHERCHE DE COMPAGNONS AUTOUR D’ÉTOILE DANS LE VOISINAGE SOLAIRE 20 PARCES
OUEDRAOGO Souleymane, Sié Zacharie KAM, Étienne ARTIGAU, Neil COOL, Aymard BADOLO, Fabrice BADO
Les naines brunes sont, en termes de masse (13M_Jupiter 80M_Jupiter). Elles se forment de la même manière que les étoiles, par contraction gravitationnelle d’un fragment de nuage de gaz moléculaire, mais se différencient par leur incapacité à produire les réactions de fusion de l’hydrogène dans leur cœur. Les naines brunes sont par conséquent(...)
Naines brunes, Compagnons, Etoiles, mouvement propre, Séparation
COMMUNICATION
Influence de la température ambiante, de l’angle et du rayon initial sur la phase vapeur lors de l’évaporation d’une goutte stagnante d’heptane en convection naturelle.
DABILGOU Téré, SANDWIDI Sayouba, BAGRE Boubou, KAM Sié Zacharie, DGHEIM Joseph, ZEGHMATI Belckachem, KOULIDIATI Jean, BERE Antoine, SANOGO Oumar
Ce travail simule le transfert de chaleur et de masse d’une goutte d’un combustible heptane évaporée dans un milieu ambiant. Le modèle proposé comprend la vaporisation de goutte de carburant mono-composant, en convection naturelle. L'analyse en phase gazeuse est couplée à une forme analyse en phase liquide pour le mouvement interne et les tran(...)
modélisation, goutte, température, évaporation, thermophysique
COMMUNICATION
CONTRIBUTION À L'ANALYSE DE LA DISPERSION DE VITESSE AUTOUR DES ÉTOILES MASSIVES DE M33
BAYALA Baguima Gilbert ; Sié Zacharie KAM,
L'étude des étoiles massives et de leur formation permet de comprendre la structure et l'évolution des galaxies. Elles permettent de mettre en évidence des structures macroscopiques telles que des bras spiraux, des barres de gaz et des anneaux de galaxies spirales par exemple. Ces étoiles extrêmement chaudes influencent considérablement leur a(...)
Galaxie : Dynamique et cinematique, Hα, Etoile: Massive
COMMUNICATION
ÉTUDE PROSPECTIVE DES PHÉNOMÈNES DE TRANSFERT RADIATIF DANS LES ÉTOILES POST-SÉQUENCE PRINCIPALE : CAS DE HD 30856 (MOUHOUN)
ZOUNGRANA André, KAM Sié Zacharie
Après son parcourt sur la séquence principale du diagramme Hertzsprung-Russell (HR), où dans son cœur de l’hydrogène est brulé en hélium, il s’ensuit, pour une étoile, la possible fusion de l’hélium, du carbone, et d’éléments plus lourds, qui par la suite, forment une enveloppe poussiéreuse autour de l’étoile. Nous étudions dans cet article le(...)
Etoile Post-MS, Enveloppe poussiéreuse, Transfert radiatif, HD 30856
COMMUNICATION
DESIGN OPTO-MÉCANIQUE D’UN INSTRUMENT VERSATILE POUR L’OBSERVATOIRE D’ASTROPHYSIQUE AU BURKINA
KAM Sié Zacharie, Bado Fabrice, Badolo Aymard, KOULIDIATI Jean, Béré Antoine
Les observations astronomiques sont basées sur l’exploitation d’instruments, qui sont de plus en plus robustes et extrêmement performant. La qualité des observations n’est pas seulement le fruit de l’instrument mais aussi du site choisi. Nous présentons dans un cette communication le design d’un instrument astronomique destiné à des observatio(...)
Astrophysique, Instrumentation, Opto-mecanique, Burkina Faso
COMMUNICATION
External Magnetic Field and Air Mass Effects on Carrier’s Effective Lifetime of a Bifacial Solar Cell under Transient State
A. DIASSO, D.OUBDA,M. OUEDRAOGO,M. SORY E. KORSAGA , S. KABRE,R. SAM ; F. ZOUGMORE1
This paper presents a theoretical study of the external magnetic field and the air mass effects on the carrier density, the transient open circuit voltage decay and the effective minority carrier’s lifetime in a polycrystalline silicon solar cell. From a theoretical approach based on the columnar model of the grains and the quasi-neutral base,(...)
Air mass, bifacial, effective lifetime, magnetic field, solar cell
ARTICLE
Electrical Power Generation from Heat Recovered at the Throat of a Downdraft Biomass Gasifier
Nzihou Jean Fidele1, *, Hamidou Salou2 , Imbga Kossi1 , Segda Bila Gerard3 , Ouattara Frederic1 , Tiemtore Hamadou1
: Gasification, a thermochemical process that takes place in gasifiers, is now understood as a process of transforming
the solid components of biomass into combustible gases essentially consisting of carbon monoxide (CO) and dihydrogen (H2).
This technology is relatively old and was widely used during the Second World War to deal with the(...)
Downdraft Gasifier, Heat Recovery
ARTICLE
Formulation and Thermomechanical Characterization of Earthbased Biosourced Composites: Cases of Clay-Hibiscus cannabinus L. Fiber, Clay-sawdust and ClayOryza sativa Husk
Sandwidi Sayouba, Haro Kayaba, Dabilgou Téré, Sinon Souleymane, Sanogo Oumar, Koulidiati Jean and Bere Antoine
This work concerns the technical study of implementation, thermal and mechanical characterization
of a composite material based on clay and plant fibers, in order to meet the need for bioclimatic and
sustainable houses. The objective was to find the proportions of clay and fibers to obtain a mixture
that would give better thermal propert(...)
Composite material; bioclimatic houses; thermal conductivity; thermal diffusivity
ARTICLE
Formulation and Thermomechanical Characterization of Earth-based Biosourced Composites: Cases of Clay-Hibiscus cannabinus L. Fiber, Clay-sawdust and Clay- Oryza sativa Husk
SANDWIDI Sayouba , HARO Kayaba, DABILOGOU Téré , SINON Souleymane, SANOGO Oumar, KOULIDIATIJean, BERE Antoine
This work concerns the technical study of implementation, thermal and mechanical characterization of a composite material based on clay and plant fibers, in order to meet the need for bioclimatic and sustainable houses. The objective was to find the proportions of clay and fibers to obtain a mixture that would give better thermal properties. A(...)
Composite material, bioclimatic houses, thermal conductivity
ARTICLE
Theoretical Proposal for a New Model of Cylindrical Biogas Combustion Cook Stove
Noufou Bagaya1# , Issaka Ouédraogo2, Windé Nongué Daniel Koumbem1, Younoussa Moussa Baldé3, Sette Diop3 & Sié Kam1
The cook stove is usually constructed from black-painted sheet metal, to better absorb energy. To enhance thermal performance, a theoretical cylindrical design is proposed in this article. This article aims to study this design and compare its performance with the conical design. Theoretical modeling of the cook stove was carried out consideri(...)
biogas cooker; heat transfer; thermal efficiency; energy
ARTICLE
Influence of the Mirror Reflectance Coefficient on the Performance of the Compound Parabolic Trough Concentrator (CPC): Numerical and Experimental Simulation in a Sahelian Environment
Souleymane Ouedraogo, Augustin S. Zongo, Jean-Fidèle Nzihou, Tizane Daho, and Antoine Béré
The objective of our study is to numerically and experimentally simulate the CPC operation according to three different values of the mirror reflectance coefficient. The study not only showed the importance of mirror reflectance in the performance of solar collectors but also estimated which of these three values fits well with the reality in(...)
CPC, temperature, reflectance coefficient, simulation, statistical indicators
ARTICLE
Influence of the Mirror Reflectance Coefficient on the Performance of the Compound Parabolic Trough Concentrator (CPC): Numerical and Experimental Simulation in a Sahelian Environment
Souleymane Ouedraogo, Augustin S. Zongo, Jean-Fidèle Nzihou , Tizane Daho andAntoine Béré
of these three values fits well with the reality in the city of Ouagadougou. The thermal exchanges that took place in the CPC were presented. A matlab program was developedfor the calculation and simulation of the different parameters of the solar concentrator. The differential equations governing the heat transf(...)
CPC; temperature; reflectance coefficient; simulation; statistical indicators
ARTICLE
Experimental Investigation for Augmentation of Thermal Performance of Solar Air Collector
Souleymane Sinon, Salifou Tera, Oumar Sanogo, Sayouba Sandwidi, Bruno Korgo a and Sié Kam
This paper presents a study of the thermal performance of a solar air collector used to heat the drying air of a fruit and vegetable dryer. The prototype collector could be a viable solution to improve energy efficiency and food security in Burkina Faso and other developing countries, by contributing to the reduction of post-harvest losses and(...)
Mots clés non renseignés
ARTICLE
THERMAL COMFORT IN A BUILDING CONSTRUCTED OF FOAM CONCRETE MADE IN BURKINA FASO
Adélaïde Lareba Ouédraogo, Germain Wend-Pouiré Ouédraogo, Kossi Bouto Imbga, Boureima Kaboré, Gilbert Nana, Karim Toussakoe, Bruno Korgo, Sié Kam, Dieudonné Joseph Bathiebo, Florent Pèlèga Kiéno, Philippe Blanchart.
Thermal comfort is a feeling of well-being in a given environment. In the context of sustainable development, new regulations on thermal insulation in the building sector are leading researchers to design new materials for
energy-saving systems and ensuring comfort in the habitat. We highlight the effects induced by the use of Pr. Blanchard's(...)
Foamed concrete, Materials, Thermal comfort, Temperature, Relative humidity