Journal of University of Babylon for Engineering Sciences最新文献

{"title":"Study the Effect of Diameter and Depth of Parabolic Dish Collector on the Concentration Ratio and Temperature Amount of Solar Tower Receiver","authors":"Sattar Al-Jabair, L. Habeeb, A. Ali","doi":"10.29196/jubes.v27i1.1977","DOIUrl":"https://doi.org/10.29196/jubes.v27i1.1977","url":null,"abstract":"This work introduces three models of parabolic dish collectors with different dimension to study the effect of change diameter and depth of the dish on the position of focus point and concentration ratio and the temperature of outlet hot water or steam by using different receivers. The present work deals with a new system consists of dish and receiver to produce hot water and steam from solar energy. The parabolic dish solar collector fabricated from iron with different dimension the first model with diameter (82 cm) and depth (6 cm), this gives focus length (70cm) and Concentration ratio (25.6). The second model with a diameter (100cm) and depth (3 cm), this give focus length (208cm) and concentration ratio (15). The third model with a diameter  (150cm) and depth (12cm), This give focus length (100cm) and concentration ratio (399) and the front side covered by nickel sheet metal to focus the solar radiation upon the receiver for all models  . Three different shapes of receiver tanks used with the third model ; namely case one which used rectangular receiver tank (100×50×5) cm3 filled with 25 liter of water. Case two used helical copper coil (12.5 mm× 3 m) inside aluminum cylindrical vessel (0.2 m ×0.6 m). Case three used radiator heat exchanger receiver tank (37×47×4) cm3 filled with 3 liter of water. Use low cost and available materials to manufacture the experimental part. The dish, used as part of the solar reflector, covered by several strips of nickel sheet metal. When the parabolic dish collector was operational, the temperature of water was 60 oC in rectangular receiver tank, 75 0C within the copper coil and 125 oC in radiator device receiver. For rectangular receiver tank, hot water obtained within time (2 h), for copper coil receiver tank, hot water obtained within time (30 min) and for radiator heat exchanger receiver, steam obtained within time (20 min).","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132924480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temperature – Potential Evapotranspiration Relationship in Iraq Using Thornthwaite Method","authors":"Hussein Ilaibi Zamil Al-Sudani","doi":"10.29196/JUBES.V27I1.1968","DOIUrl":"https://doi.org/10.29196/JUBES.V27I1.1968","url":null,"abstract":"One of the most important outcomes in the water balance equation for any natural area or water body is Evapotranspiration and it is also a crucial component of the hydrologic cycle. The relationship of temperature - evapotranspiration was obtained using the Thornthwaite method in Iraq by dividing the area into (7) sectors according to geographic latitude. Each sector has multi meteorological stations where (32) stations were used with different periods of records. A mathematical relationship was obtained between mean temperature and corrected potential evapotranspiration (PEc) with (97.45) to (99.84) coefficient of determination. Mean temperature has a symmetrical decreasing pattern from south-east towards north-west of Iraq affected by Mediterranean Sea climate conditions, while correcting potential evapotranspiration (PEc) has the opposite direction of increasing values due to a direct relationship with temperature.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"101 22","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120826032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of SiC Addition on AlNi Compact Mechanical Properties Produced Via Powder Metallurgy","authors":"A. H. Haleem, Nawar Fahem Kadhem","doi":"10.29196/jubes.v27i1.1974","DOIUrl":"https://doi.org/10.29196/jubes.v27i1.1974","url":null,"abstract":"This research directed to produce Al-Ni alloys by powder metallurgy technique since of its marketable and industrial significant. Nickel and aluminum powders were determined their particle size then the powders mixed and blended with percent (Al - 20% Ni). Silicon carbide particles (SiC) powder supplemented to master alloy powder by percent (4-6- and 8 wt. %) separately then these powders mixed to obtain homogeneous distribution, then the powders compacted in cold pressure at 700 MPa. The sintering procedure was performed at (530°C) for 8 hrs. At vacuum atmosphere (10-4 torr). After cooling these samples grinded and polished to estimate microstructure, density, porosity, LOM, SEM, EDS, X-ray diffraction ,hardness and wear tests at dissimilar circumstances. Results showed that the hardness increased by (52%) and wear rate decreased by (55%) at 8 wt % silicon carbide addition, and it was the best results.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131270168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of the Constants and Variables of the Architecture of the Holy Shrines in the Adjacent Urban Fabric","authors":"Mahmood Rezooky Hamid, Almamoori Hamza","doi":"10.29196/jubes.v27i1.1969","DOIUrl":"https://doi.org/10.29196/jubes.v27i1.1969","url":null,"abstract":"Among the constants of holy attba building is the connection of its architecture with the values of the Islamic religion and the number of visits and the number of visitors to it. Time has passed and visitors are in a state of increasing, so their founders have taken the decision of change and development previously, which was compatible with the increase in numbers and maintaining the constants of the sacred architecture. The adjacent fabric changes according to the change in its holly architecture, and the adjacent fabric forms one unit with its attba, maintaining its shape for centuries. In the 1930s, its fabric was affected by the decision to demolish the walls of cities in general, including the holy cities, to open roads to facilitate the traffic movements of cars and the arrival of visitors with high speed as planned at the time. The Research problem despite  the development of master plans for the Holy City cities because of the increase in the number of visitors, but did not solve the problem required. The aim of the research is to identify the visitor, the activities of the visitors, the spaces occupied by the activities, the religious and ideological activities, as well as the cultural and social activities, an important criterion in the holy attba building and its adjacent fabric, which has been affected by the increase of visitors and which is no longer sufficient for the activities generally been done throughout the year.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"295 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133132422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stabilization of Soils Using Chemical Admixtures: A Review","authors":"M. N. J. Alzaidy","doi":"10.29196/jubes.v27i1.1970","DOIUrl":"https://doi.org/10.29196/jubes.v27i1.1970","url":null,"abstract":"Searching for the best soil stabilizer to overcome problems occur by the soft soils are still being the main concern, not only to achieve the required soil engineering properties but also by considering the cost and the effect to the environment. This review paper presents the results of experimental researches on soil stabilization by using the most chemical admixtures, which involved cement, lime and fly ash, and their effectiveness in the engineering properties of soil. Based on the literature review, the results show that addition of these chemical additives lead to significant improvement in workability, strength, durability and mechanical behaviour. On the other hand, it lead to a reduction in shrinkage, plasticity, compressibility and swell characteristics of soil. Also, the curing duration had significantly improved the strength properties of the stabilized soil with chemical additives. Using of each chemical additive and its suitability for a specific soil is highlighted in the research.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129499060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design Blocks in Simulink to Detection Singularity in the Workspace of Gough-Stewart Robot Manipulator","authors":"H. M. Alwan, R. A. Sarhan","doi":"10.29196/JUBES.V27I1.1967","DOIUrl":"https://doi.org/10.29196/JUBES.V27I1.1967","url":null,"abstract":"This work deals with Gough-Stewart robot manipulator, which has six degrees of freedom, six actuators, fixed base, and moving platforms. Here, the Jacobian matrix derived to detect the singular point in the workspace for manipulator at determinant of Jacobian matrix equal to zero, then derived the equation of motion from the dynamic analysis by Lagrange method to verify the singular points with Jacobian where the forces increase rapidly at this point. Finally, design blocks in Simulink include the Jacobian matrix and the equations of motion to detection the singularities at any time for current input parameters (X, Y, Z, α, β, γ), where the determinant of the Jacobian equal to zero at maximum forces.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133651862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Heat and Mechanical Treatments on Mechanical Properties of Al-Zn-Mg-Cu Alloys","authors":"Fouad El Dahiye, Mahmoud AlAssaad, Mohamad Yehea Alnefawy","doi":"10.29196/JUBES.V27I1.1975","DOIUrl":"https://doi.org/10.29196/JUBES.V27I1.1975","url":null,"abstract":"In this research the effect of various heat treatments on tensile properties and hardness of Aluminum-Zinc-Magnesium-Copper alloy (7075 Aluminum alloy) was studied, with and without mechanical treatment by extrusion process. The 7075 alloy samples were submitted to two type of heat treatments, T6 heat treatment by artificial ageing samples in 120 ºC for 24 h and retrogression and re-ageing (RRA). Where in RRA treatment the first ageing done in 120 ºC for 24 h, then the retrogression done in 180 ºC for 30 min and re-ageing in 120 ºC for 24 h. We got the best results by apply the RRA treatment with extrusion process, where tensile strength was reached to 380 Mpa without extrusion machining process, while reached to 530 Mpa with extrusion process","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121986270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vibration Analysis of Uniform and Tapered Composite Beams with Embedded Shape Memory Alloy","authors":"Q. Atiyah, A. Hameed, Baqer Jabbar Assi","doi":"10.29196/jubes.v27i1.1972","DOIUrl":"https://doi.org/10.29196/jubes.v27i1.1972","url":null,"abstract":"In this study, laminated composite materials were hybridized with E-glass fiber and Nitinol (Nickel-Titanium) wires. Hand lay-up technique was used to prepare the samples, epoxy resin type (Sikadur 52 N) was used as matrix reinforced by one fiber from E-glass fiber woven roving with embedded nitinol wires with a diameter 0.5 mm for samples and number of wires such as 0, 1, 3, 5 and 9 to find the effect of the number of wires on the natural frequency. The samples were fixed as a cantilever beam. The effects of increasing the number of nitinol wires, the diameter of nitinol wires, the length of the cantilever beam and the thickness of beam on the natural frequencies of the beam were studied. Also, the effects of the tapered in width side and thickness side on the natural frequencies of cantilever beam were studied. The results showed that the increasing in the number of nitinol wires and the diameter of nitinol wires lead to decrease the natural frequency in martensite phase and increase the natural frequency in austenite phase. Also, the increasing in thickness of beam and width ratio of the beam lead to increase the natural frequency. As well as, the increasing in the thickness ratio leads to increase the first natural frequency and decrease the second and third ones. In addition, the increasing in the length of the beam decreases the natural frequency.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130695733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical Framework for Design Recruitment Strategies In The Process Of Self-Healing Of Individuals","authors":"G. Younis","doi":"10.29196/jubes.v27i1.1971","DOIUrl":"https://doi.org/10.29196/jubes.v27i1.1971","url":null,"abstract":"The concept of self-healing based on characteristics of environment design of surrounding the individual ,Healing by design, one of the most important concepts corresponding to the healing environment or healing in the context of healthcare buildings, where the awareness of this concept reach on the characteristics of internal environment in general to make it more  healthy, stimulating and vital, the concept of self-healing is result of analyzing the mutual and vital relationship between human and physical and natural environment in an attempt to understand the relationship and the extent of its repercussions on the physiological and psychological level of the individual. The process of healing  cannot be understood by isolation from the factors that work dynamically in the life of individual ,and  function of the building is not limited to housing and containment of activities and to meet functions of life, but the most important role is to improve the performance of vital act of  life and make it healthy and support self-healing. Hence, the problem of research in the awareness of importance of architecture in taking the task of stimulating self-healing for the individual, and identify characteristics of design approach based on the design processes resulting from the dynamic relationship of the individual's living with the environment. The object of the study is to build a theoretical framework of design recruitment strategies in the process of self-healing of individuals Both for therapeutic environment and general internal environment, and to derive the possible values ​​of the design characteristics that achieve those strategies stemming from the mechanism of involving the individual in a conscious and clear process of support, balance and moral nutrition in relation to the environment. The basic and secondary vocabulary and possible values ​​of the conceptual framework for the strategies of design recruitment in the healing process were three basic strategies: strategy of environment potential supporting of individual, strategy of balancing the life components of the individual and experiment of space transition, and finally the nutrition strategy at the vital and poetic level of individuals. The conclusions were based on objective understanding of the quality of design that supports the process of healing, which is completely different from the concept of design in dealing with static and formal assets. The design here is characterized by the dynamic nature of healthy lifestyle design based on stimulating the process of healing at organic, sensory and moral levels for individuals.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129781059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gas Turbine Tubular Combustor Main Injector Optimization for Low Emission Combustion","authors":"Arkan Khikhal Husain, Mahmood Attallah Mashkoor, Fuad Abdul Ameer Khalaf","doi":"10.29196/jubes.v26i10.1799","DOIUrl":"https://doi.org/10.29196/jubes.v26i10.1799","url":null,"abstract":"This work presents the experimental investigation results of high performance and low emission colorless combustion in a gas turbine tubular combustor at atmospheric conditions. Low emission and colorless oxidation reaction is characterized by dispersed flame and temperature under the conditions of preheated air. System performance, emissions of CO and UHC are recorded up to achieve low emission colorless combustion, the flame capturing, Measurements of temperature, inlet air mass flow rate and gas fuel LPG flow rate for variable of fuel main injector holes diameter. concluded that maximal air mass flow rate, with choked fuel flow in the main injector for each cases promotes the formation of colorless pal blue flame combustion, for 3.2 g/s of fuel flow rate with 6 holes and 1mm main injector holes diameter and lower CO emissions and decreasing in UHC emissions (70 → 10) ppmv with increasing in power generation (0.5 → 3.42) kW and decreasing in S.F.C. (21.5 → 3.49) kg/kwh.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130159781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}