Experimental investigation on Zirconia coated high compression spark ignition engine with ethanol as fuel

789-794This study presents effect of coating on piston, cylinder head, and valves on the performance of a modified four stroke diesel engine using wet ethanol (5% water) as a fuel and emission characteristics of exhaust gas. Zirconia, which has low thermal conductivity, high temperature resistance, chemical inertness, high resistance to erosion, corrosion and high strength, was selected as a coating material for engine components. Ethanol was sprayed in inlet manifold and spark plug was erected on engine head to facilitate ignition. Engine’s performance was studied for both wet ethanol and diesel with and without Zirconia coating. Also, emissions values were recorded to study the engine’s behavior on emissions

Development of mathematical model to predict the mechanical properties of friction stir

This paper presents a systematic approach to develop the mathematical model for predicting the ultimate tensile strength,yield strength, and percentage of elongation of AA6351 aluminum alloy which is widely used in automotive, aircraft anddefense Industries by incorporating (FSW) friction stir welding process parameter such as tool rotational speed, weldingspeed, and axial force. FSW has been carried out based on three factors five level central composite rotatable design withfull replications technique. Response surface methodology (RSM) is employed to develop the mathematical model. Analysisof variance (ANOVA) Technique is used to check the adequacy of the developed mathematical model. The developedmathematical model can be used effectively at 95% confidence level. The effect of FSW process parameter on mechanicalproperties of AA6351 aluminum alloy has been analyzed in detail

Thigh-length compression stockings and DVT after stroke

Controversy exists as to whether neoadjuvant chemotherapy improves survival in patients with invasive bladder cancer, despite randomised controlled trials of more than 3000 patients. We undertook a systematic review and meta-analysis to assess the effect of such treatment on survival in patients with this disease