This paper studies the impact of installing noise-suppressing deflector vanes in the bypass flow on the aerodynamic performance of the dual-stream supersonic nozzle of a turbofan engine by using a three-dimensional Reynolds-averaged Navier-Stokes computer program. A series of nozzle configurations using a single pair or double pairs of vanes with NACA0012, NACA4412, and NACA7514 airfoil profile...

In this paper, effect of geometric parameters of a centrifugal fan with backwardand forward-curved blades has been investigated. Centrifugal fans are used for enhancing the heat dissipation from the IC engine surfaces. In the process, the fan consumes power generated from the engine. As a first step, an experimental setup was developed and prototypes of fans were made to carry out measurements ...

In recent years, commercial demand for comfortable and quiet vehicles has encouraged the industrial development of methods to accommodate a balance of performance, efficiency, and comfort levels in new automotive year models. Particularly, the noise, vibration and harshness characteristics of cars and trucks are becoming increasingly important (see, e.g., (Buchholz, 2000), (Capitani et al., 200...

This study arose from the need to control noise in naval vessels to reduce their detectability and hence vulnerability to enemy attack. In this report a detailed review of sensor and actuator technologies that could be used for active noise and vibration control in ship structures has been provided. The review focused on a wide range of sensor and actuator materials, such as piezoelectric and e...

This study describes a strength-based design analysis protocol by means of finite element (FEA) for damaged engine mounting bracket in converted electric vehicle. The considered the is product specifically designed and manufactured vehicle failed during conventional operation Thus, improvement/revision (redesign) on geometry was investigated. In this context, to prevent such undesired failures,...

Abstract In recent days, there is much focus on the modularity of platform to reduce cost and improve system-level design efficiency. this paper, a study has been done for various non-linear input torque (different powertrain) optimization with modular powertrain mounting system where only stiffness varied achieve goal. Here, goals are maximization kinetic energy distribution decoupling rate mi...

background: : permanent slide preparation of nematodes especially small ones is time consuming, difficult and they become scarious margins. regarding this prob­lem, a modified double glass mounting method was developed and com­pared with classic method. methods: a total of 209 nematode samples from human and animal origin were fixed and stained with formaldehyde alcohol azocarmine lactophenol (...