iosr-JMCE   Volume-11 ~ Issue-1 ~ Jan-Feb 2014

Abstract:This project develops a rocket nozzle. The nozzle is designed in such a way that the divergent portion of the nozzle geometry must pass through a clover that is placed on the perimeter, thus creating a space for air intake into the centre of an annular rocket exhaust stream. The main objective of this project is to determine the best one from (3clover, 4clover and 5 clovers) and comparison of numerical simulation to a predefined Mach number distribution of in viscid solution and viscous simulation using the k-model will be attempted.

[1]. Turner, M. J. L., Rocket and Spacecraft Propulsion: Second Edition, Praxis Publishing Ltd., 2005.
[2]. Tajmar, M., Advanced Space Propulsion Systems, Springer-Verlag/Wien, 2003.
[3]. Sutton, G. P., History of Liquid Propellant Rocket Engines, American Institute of Aeronautics and Astronautics, 2006.
[4]. Daines, R. and Segal, C., "Combined Rocket and Air breathing Propulsion Systems for Space- Launch Applications," Journal of Propulsion and Power, Vol. 14, No. 5, 1998, pp. 605–12.
[5]. White, F. M., Fluid Mechanics, Boston: McGraw-Hill, 5th ed., 2003.
[6]. Ejector air intake design method for a novel rocket-based combined-cycle rocket nozzle by Timothy S. Waung, Carleton University Ottawa, Ontario, Canada April 2010
[7]. Manski, D. and Hagemann, G., "Influence of Rocket Design Parameters on Engine Nozzle Efficiencies," Journal of Propulsion and Power, Vol. 12, No. 1, 1996, pp. 41–7.

Abstract: The engineering design of industrial chimneys requires predicting the temperature decay of exhaust gases along the walls of chimney. This paper investigates the practical calculation of the thermal performance of industrial chimneys which leads to estimating the static draft and the bulk temperature of combustion gases at the chimney's exit for determining the air pollution levels in the vicinity of the stack. A modified analytical model is used to obtain accurate heat transfer results. Heat transfer processes involving the internal convection heat transfer, external heat transfer to the surrounding and conduction heat transfer, which takes into account fouling resistance are considered.

[1] Corte's C. and Campo A., 1999," Rapid computation of the exit temperature of hot combustion gases flowing inside chimneys", Applied thermal engineering, Vol.19, pp. 969-990.
[2] Campo A. and Campo L., 1997,"An algebraic solution for a 2-D partial differential energy equation with a robin boundary condition generated from the simpler solution for adirichlet boundary condition", Computer Math's Applications, Vol.34, pp.101-114.
[3] Marefa W., Cherkaoui H., Crausse P.and Boisson H., 2003,"Heat transfer in the turbulent flow through a conduit for removal of combustion products", Building and Environment, Vol. 38, pp. 763 – 770.
[4] Ming Chu C., Mizanur Rahman M. and Kumaresan S., 2011," Effect of cold inflow on chimney height of natural draft cooling towers", Nuclear Engineering and Design, Vol.249, pp.125-131.
[5] Joye D., 2003,"Pressure drop correlation for laminar, mixed convection, aiding flow heat transfer in a vertical tube", International Journal of Heat and Fluid Flow, Vol.24, pp. 260-266.

Abstract: Nowadays people concentrate more and more on the comfort and operability of automobiles. Four wheel-drives in cars have become popular and are in demand in the automotive sector. But the advancement in two wheelers was limited. The concept of two wheel drive motorcycles was not successfully and economically implemented. Two wheel drive motorcycle is desirable in situations where there is rough terrain and high inclination roads which are tiresome and difficult to drive with the conventional rear wheel driven motorcycles. The two wheel drive bikes are apt for farmers, military applications, desert drive etc. The proposed design provide economical and user friendly two wheel drive. The use of chain drive and sprockets help in reduction of power loss during transmission of power from the engine to front and rear wheels. The lightweight 'all-mechanical system' is used to obtain two wheel-drive.

[1] William H. Crouse and Donald L Anglin, Automotive Mechanics(New York: McGraw-Hill, 1994).
[2] Joseph Edward Shigley, Mechanical Engineering Design(New Delhi: Tata McGrag-Hill Education, 2001).
[3] R.S. Khurmi and J.K. Gupta, A Textbook of Machine Design(New Delhi: Eurasia Publishing House, 1979)

Abstract: The matrix is the monolithic material into which the reinforcement is embedded, and is completely continuous. Metal Matrix Composites (MMCs) possess significantly improved properties. Among the MMC's aluminium composites are predominant in use due to their low weight and high strength. In this project the Tensile test, compression and Hardness test results of Aluminium 6061 Reinforced with E- Glass Fibre and Fly ash composite is studied. Also microstructure of the specimen is analysed. The reinforced composites were manufactured by Stir Casting process.

[1] Mahendra.K.V and Radhakrishna. K, Castable composites and their application in automobiles, Proc. IMechE Vol. 221 Part D: J. Automobile Engineering, (2007): pp. 135-140
[2] Hung N. P, Boey,F.Y.C. Khor K.A, Phua Y.S. and Lee H.F, Machinability of aluminium alloys reinforced with siliconcarbide particulates, Journal of Materials Processing Technology,56 (1996): pp. 966-977
[3] Lindroos V.K, Talvitie M.J, Recent advances in metal matrix composites, J. Mater. Proc. Technol. 53 (1995): pp. 273–284.
[4] MohantySamrat, Chugh Y.P., Development of fly ash-based automotive brake lining, Tribology International 40 (2007): pp. 1217–1222
[5] RohatgiP.K,Weiss D, and Gupta Nikhil, Applications of Fly Ash in Synthesizing Low-Cost MMCs for Automotive and Other Applications, Journal of the Minerals, Metals and Materials Society, vol 58,(2006): pp 71-76

Abstract: Stress is ability of materials to resist failure. The relationship between yield strength and yield stress of various grade of steel being hot rolled is necessary to predetermine the failure of engineering materials.The Torsional tests obtained by previous researchers for temperature range of 6000C to 12010C and Strain rate of 0.0001 to 5.0 sec-1 were analyzed with the aim of obtaining the relationship necessary to describe the yield stress and yield strength of each material as a function of the deformation variables (Strain rate and temperature).

[1]. Aiyedun, P.O., Nwanrto, F.N.; Adeleke, A.E.; and Alamu, O.J. (2010). "Yield
[2]. Strength Estimation ForStainless Steel Using Plane Strain Compression Test". Australian Journal of Basic and AppliedSciences. 4(12), pp. 6312 – 6318. ESSN 1991 – 8178.
[3]. Aiyedun, P.O., Oseghale, L.E., and Alamu, O.J. (2009), "Simulation of Load Bearing Rod Rolling ofCarbon-Manganese Steel Using the "Phantom Roll" Method," Pacific Journal of Science and Technology, Vol.10, pp 4-14.
[4]. Aiyedun, P.O. (1999), "Yield Stress Variation across thickness for Steel (HC SS316) Specimen HotRolled at low reduction and low strain rates". NSE. Technical Transactions, Vol. 34, No.1.,pp. 46 – 70
[5]. Aiyedun, P.O. (1984), "A study of loads and torque for light reduction in hot flat rolling at low Strainrates," Ph.D. Thesis, University of Sheffield, UK.

Abstract: A gyroscope is a device for measuring or maintaining orientation, based on the principles of momentum. Mechanically, a gyroscope is a spinning wheel or disc in which the axle is free to assume any orientation. Although this orientation does not remain fixed, it changes in response to an external torque much less and in a different direction, than it would without the large angular momentum associated with the disc's high rate of spin and inertia. Ships or sea vessels require stabilization when they face heavy sea waves.

[1] Theory of Machines"- Compiled By- Khurmi R.S, Gupta J.K, Published By- Eurasia Publishing House (Pvt) Ltd, New Delhi .
[2] Schaum‟s Outline Of Fluid Mechanics And Hydraulics, Third Edition.
[3] RuiFeng et al, MEMS thermal gyroscope with self-compensation of the linearacceleration effect
[4] Stephen C. Spry et al, Gyroscopic Stabilization of Unstable Vehicles: Configurations, Dynamics, and Control.
[5] Quan Hu et al, Dynamics and Vibration Suppression of Space Structures with Control Moment Gyroscopes

Abstract: Best-Value contracting is a mechanism that many agencies used to effectively implement projects with multiple objectives. It allows the government to acquire goods and services from the businesses that offer the Best-Value to the government, not simply the low-bid. The Low-bid contracting is false economy as the initial savings from price-based competition are erased by additional long-term costs. This paper discusses the implementation of the Best-Value concept in the procurement of construction projects. The main goal of the model implementation is studyingthe effect of changingBV model variables on the selection decision. Sensitivity analysis isconduct using scenarios of selection decisions. These scenarios are extremely important to the decision makers as it provide them with the reliability level and limitations of the model utilization. The paper provides both the decision makers and researchers with Sensitivity Charts that offer the guidelines for model implementation in real-world projects. Sensitivity Charts shows the effect of past performance data on the resulted Best-Value and the selected contractor as well

[1]. Abdelrahman, M., Zayed, T., & Elyamany, A. (2008). Best-Value Model Based on Project Specific Characteristics. Journal of Construction Engineering and Management , 134 (3).
[2]. Abdelrahman, M., Zayed, T., Hietpas, J., & Elyamany, A. (2008). Rational Best-Value Model Based on Expected Performance. TRB Annual Conference. Washington, D.C.
[3]. Carol Daly (2006) .Best Value and Stewardship Contracting Guidebook: Meeting Ecological and Community Objectives. Sustainable Northwest, Portland, OR.
[4]. Gransberg, D., & Ellicott, M. (1997). Best-Value Contracting Criteria. Journal of Cost Engineering , 39 (6), 31-34.
[5]. Gransberg, D., &Senadheera, S. (1999). Design-Build Contract Award Methods for Transportation Projects. Journal of Transportation Engineering , 125 (6), 565-567.