Figure - available from: Heat Transfer
This content is subject to copyright. Terms and conditions apply.
Source publication
The main objective of this paper is to reduce the drag force and enhance the uniform airflow inside an existing non‐air‐conditioning bus coach system. The redesigning of an existing bus carried out by considering the forces that reduce the moment of the bus. Modeling and meshing was carried out using solid works and Hypermesh software, respectively...
Citations
... High ambient temperatures can also lead to the failure of hybrid connectors. This condition [13][14] can decrease the insulation resistance of the connectors, which can cause them to fail. Although they are designed to improve the functionality of a circuit, connectors should not be used as the primary component of a system. ...
Due to the increasing number of devices and systems connected to an electric system, the need for reliable and high-quality electrical connectors has become more prevalent. This project aims to optimize the design of an electrical connector during its two most critical stages: insertion and retention of housing using FEA. A structural analysis is performed during the insertion and retention stages of housing. This process involves calculating the dimensional deformations and maximum strains developed during the steps mentioned above to determine the reliable functioning of electrical contacts. The input geometry is fed to the finite element analysis. The forces applied on the connector’s latch on their respective connection are ensured to be under the limit. The analysis and simulation results are reflected to validate the safe forces in the connector assembly and a proper justification for an experimental set up in the laboratory.
... The CFD analysis for a three-dimensional bus coach was carried out using ANSYS software, and the results are within the acceptable limit [10,11]. Niranjana et al. [12] numerically analysed Ashok Leyland MTX Micra 28-seater on different types of boundary conditions and estimated the drag force would reduce to 0.67 by redesigning the bus structure. ...
Air circulation plays a vital role in the comfort of passengers in a bus, being a non-AC bus without any aid from the air conditioning system. The circulation of air is utterly dependent on the design of the bus and the natural flow of air. However, optimize the flow of air inside the bus, a study on the design of the bus is needed. In this regard, experimental work was carried out to achieve uniform airflow by redesigning the coach into an aerodynamic shape. The openings are provided at the leading edge of the bus to evaluate the best possibility for air to circulate in the bus. Three openings were provided at the leading edge of the bus, the first and second openings were mere openings, and the third opening was fitted with a roof vent providing three different geometric patterns to airflow. The initial boundary conditions were developed by considering that all windows and doors of the bus are closed. The scaling ratio of 1:20 was considered for modeling the bus. The experiments were conducted in the wind tunnel test rig. It was observed from the experimentation that the velocity of the air was considered to be the most influential parameter for the optimal air circulation. The velocities of 21.96 m/s and 22.68 m/s were obtained inside bus. The obtained experimental velocities were validated with results obtained by the Computational Fluid Dynamics (CFD). It was observed that a deviation of 5% for the given velocity of 20 m/s.
... The CFD analysis for a three-dimensional bus coach was carried out using ANSYS software, and the results are within the acceptable limit [10,11]. Niranjana et al. [12] numerically analysed Ashok Leyland MTX Micra 28-seater on different types of boundary conditions and estimated the drag force would reduce to 0.67 by redesigning the bus structure. ...
... The blower as an auxiliary unit facilitates in proper air circulation for the passengers when the bus is stationary. The duct size and heating load in a Non AC bus coach is calculated based on the standards [10][11][12][13][14][15]. The present work focuses on the development is that it's aimed at meeting all the standards set by ISHRAE (Indian society of Heating, Refrigerating and Air conditioning manufactures association) and the use of natural resources, does not pollute like AC does. ...
Public transport is the life line in many of the developing and under developed countries for the safe conveyance, i.e. also consider as economical. The major limitation in public transport (non-AC busses) Air Condition, is the lack of proper air circulation leading to suffocation and vomiting. The present research work emphasis on design and analysis of air flow duct system (non AC Busses) to increase the level of comfortance of the passengers, tools like solidworks software 2016 is used for 3D drawing, Hypermesh software 13.0 is for the discretization and ANSYS Fluent software 16.0 for the Computational Fluid Dynamic (CFD) analysis, from the experimental the airflow is found to be 10 m/s, and from the numerical analysis the airflow is found to be 9.8 m/s, by comparing the experimental and numerical results a negligible deviation of 2% is observed and it is within the limit.
