Publications (357)
ARTICLE
NUMERICAL ANALYSIS OF NATURAL CONVECTION AND INFLUENCE OF THE COLLECTOR RADIUS ON THE VELOCITY AND TEMPERATURE FIELDS IN A SOLAR TOWER WITHOUT TURBINE
Moctar Ousmane, Boureima Kaboré, Germain Wende Pouiré Ouedraogo, Salifou Ouédraogo, B. Magloire Pakouzou, Thierry Sikoudouin Maurice KY, Dianda Boureima, KAM Sié and Dieudonné Joseph Bathiébo
In this paper, we present a numerical analysis of natural convection and the effects of collector radius variation on the velocity and temperature field. After transforming the conservation equations of mass, momentum and energy, we compare the results of our calculation code with those of Comsol. On the one hand, the comparative study of the(...)
Solar tower, Natural convection, Collector radius, Comsol
ARTICLE
Experimental Study of a Diesel Engine Incorporating a "KALAMA" Screw and Operating on Vegetable Oils
Gounkaou Yomi Woro , Diané Ali , Koala Lucmane , Daho Tizane , Sanogo Oumar , Béré Antoine
The vegetable oil is an alternative fuel that complements or substitutes for fossil fuels. However, its use in diesel engines gives rise to a number of difficulties, especially at low engine power levels. To resolve these problems, improving the thermal conditions in the engine's combustion chamber is one of the solutions being considered. Thi(...)
Indirect Injection, Pre-Chamber Screw, KALAMA Screw, Hot Spot
ARTICLE
EXPERIMENTAL STUDY OF AN INDIRECT SOLAR DRYER USING NATURAL CONVECTION: CHANGES IN THREE PHYSICAL PARAMETERS
OUEDRAOGO Souleymane, SANEMBAYE Adrien, NANA Gomwêndkouni Gilbert, AMADOU OUMAROU Fati, KY Thierry Sikoudouin Maurice, KAM Sié and BATHIEBO Dieudonné Joseph
An experimental study was carried out on an indirect solar dryer operating with natural convection. The study focused on the behavior of three parameters over time. Solar radiation at the measurement site, the temperature of various elements of the collector and of the air at four precise locations inside the dryer, and the velocity at its out(...)
Experimental study, indirect solar dryer, natural convection, physical parameters
ARTICLE
Comparative Study of Available Solar Potential for Six Stations of Sahel
Serigne Abdoul Aziz Niang, Ahmed Gueye, Astou Sarr, Dialo Diop, Saka Goni, Bado Nebon
Sahel is an African area with high solar potential. However, this potential is not uniform across the region. This paper examines the spatial distribution of the available solar potential by using six stations across the Sahel area. This
comparative study was based on the analysis of in situ measurements in Dakar in Senegal, Niamey in Niger,(...)
Solar Potential, Pyranometer, Sahel, Comparative Study
ARTICLE
Conception, Realization and Testing of a Solar Cooker Built with Ring Array Concentrator - RAC in sub Saharan region
Thierry Sikoudouin Maurice Ky, Ibrahim Sorgho, Sayoba Sawadogo, Dieudonne Dabilgou, Salifou Ouedraogo, Adama Ouedraogo, Sie Kam, Dieudonne Joseph Bathiebo
A Ring Array Concentrator - RAC was conceived, realized and tested for cooking purpose in Burkina Faso where irradiation flux is about 5.5kWh/m/day. The RAC, having a useful aperture area of 1.692 m, was built with five (5) imbricated conical concentrators. The conceived RAC has a mean geometric concentration ratio evaluated to 38, allowing a(...)
Ring-Array concentrator - RAC, Optical analysis, Geometric concentration ratio, Thermal performance, Cooking
ARTICLE
Search for Qualified Soil for the Production of Low-Energy Biobased Composite Materials
Sandwidi Sayouba, Haro Kayaba, Dabilgou Téré, Sinon Souleymane, Sanogo Oumar, Koulidiati Jean and Bere Antoine
The development of earth-based bio-sourced materials requires a thorough analysis of the study
soil. For the present study, we took five (05) soil samples from a tunnel-digged quarry in the layer
between 0.5 m and 5 m : white clay (MSB-BL), red clay (MSB-RG), weak clay or sandy clay (MSBFB), strong clay (MSB-FR) and mixture (MSB-ME). To v(...)
Earth; granulometry; argillosity; composite materials
ARTICLE
Search for Qualified Soil for the Production of Low-Energy Biobased Composite Materials
SANDWIDI Sayouba , HARO Kayaba , DABILGOU Téré , Sinon Souleymane , SANOGO Oumar , KOULIDIATI Jean, & BERE Antoine
The development of earth-based bio-sourced materials requires a thorough analysis of the study soil. For the present study, we took five (05) soil samples from a tunnel-digged quarry in the layer between 0.5 m and 5 m : white clay (MSB-BL), red clay (MSB-RG), weak clay or sandy clay (MSB-FB), strong clay (MSB-FR) and mixture (MSB-ME). To verif(...)
Earth, granulometry, argillosity
ARTICLE
Conception, Realization and Testing of a Solar Cooker Built with Ring Array Concentrator -RAC in sub Saharan region
Thierry Sikoudouin Maurice Ky, Ibrahim Sorgho, Sayoba Sawadogo, Dieudonné Dabilgou, Salifou Ouédraogo, Adama Ouédraogo, Sié Kam, Dieudonne Joseph Bathiebo
A Ring Array Concentrator - RAC was conceived, realized and tested for cooking purpose in Burkina Faso where irradiation flux is about 5.5kWh/m2/day. The RAC, having a useful aperture area of 1.692 m2, was built with five (5) imbricated conical concentrators. The conceived RAC has a mean geometric concentration ratio evaluated to 38, allowing(...)
Ring array concentrator-RAC, Optical analysis, Geometric concentration ratio, Thermal performance, Cooking
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
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
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
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
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
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