Most of internal combustion engines have one or two heat shields that have been installed on the exhaust manifold to avoid the heat transfer to upper parts of the engine such as the valve cover. In some engines, this part fails due to the fracture and causes engine noise and other failures in the engine. In this paper, the failure of a heat shield due to vibrational loads of the engine has been...

In order to comply with stringent pollutant emissions regulations, a detailed analysis of the engine combustion and emission is required. In this field, computational tools like CFD and engine cycle simulation play a fundamental role. Therefore, the goal of the present work is to simulate a high speed DI diesel engine and study the combustion and major diesel engine emissions with more deta...

Objective(s): Iranian researchers have enriched conventional engine oil with nanoparticles at the Institute of Petroleum Research and hope that this product can replace conventional engine oil due to the improved effects of copper nanoparticles on oils. the purpose of this study was to investigate the pathological effect of engine oil enriched with copper nanoparticles on the rat.Methods:...

the machine to be designed and developed with a view to resolve one ofthe irksome problems of this institute has been facing every year. this institute issurrounded by vast non- fertile land area of about 200 acres, which becomes widelyoccupied by numerous breads of bushes and shrubs during post-rainy season. due tothis unwanted proliferation of such verdant institute gets abysmal look and that...

The conceptual design of the hydrogen-fueled detonation ramjet (DR) a new type for cruising flight speed Mach 2 at sea level is developed using 3D numerical simulations operation process. calculated effective thrust such DR shown to become positive M = 1.3, i.e., startup number can be lower than ≈ 2.0, which typical ramjets operating on continuous-deflagration combustion. A demonstrator designe...

operating an engine with homogeneous charge compression ignition (hcci) technique is a promising technique to lower nox and pm emissions of engines while achieving high efficiency and lower fuel consumption. nevertheless, applications for hcci are still limited due to the absence of a definite means to control ignition timing and narrow operating region. a single cylinder diesel engine with com...

Variable-throat adjustment is the most practical flow regulation method of solid ducted rocket ramjet (SDR). The high-fidelity mathematical model interstage valve basis for realizing high-precision gas and thrust regulation. In this paper, complex effect was divided into load throat deformation effect. mainly determined by clearance, friction torque, pneumatic torque that subjected to during op...