NUMERICAL SIMULATION OF VENTILATION SYSTEM WITHIN AN ARMORED VEHICLE CABIN

2007 ◽  
Vol 14 (2) ◽  
pp. 201-223
Author(s):  
Chin-Lung Chang ◽  
Chang-Hsien Tai ◽  
Chien-Hsiung Tsai ◽  
Yu-Ren Wang ◽  
Qing-Shan Hon
Keyword(s):  
Numerical Simulation ◽  
Ventilation System ◽  
Vehicle Cabin ◽  
Armored Vehicle

An approach of multistage connected ventilation cooling structure for armored vehicle thermal management

2021 ◽  
pp. 1-27
Author(s):  
Zhendao Xu ◽  
Yuge Han ◽  
Dengfeng Ren ◽  
Jishan Li
Keyword(s):  
Numerical Simulation ◽  
Thermal Management ◽  
Thermal Environment ◽  
Structural Characteristics ◽  
Infrared Detection ◽  
Exhaust Pipe ◽  
Exhaust Gas ◽  
Detection Power ◽  
Vehicle Cabin ◽  
Armored Vehicle

Abstract The thermal environment of the power cabin and high temperature exhaust gas seriously affect the performance and survivability of armored vehicle on the battlefield. In order to improve the hostile thermal environment of the enclosed power cabin and inhibit the infrared characteristics of exhaust gas, this paper puts forward a multistage connected ventilation cooling structure based on the unique structural characteristics of the armored vehicle. The structure utilizes the rotating action of the fans to introduce the cold air into the power cabin, volute and smoke exhaust pipe in turn. The effects of the multistage connected structure on the temperature field and exhaust infrared detection power of armored vehicle were studied by numerical simulation. It was indicated that the multistage connected ventilation cooling structure can effectively improve the thermal environment of the armored vehicle cabin by about 15.18% and reduce the infrared detection power of exhaust gas by about 11.35%. This paper is of great significance for studying the cooling of power cabin and the design of armored vehicle's infrared stealth.

A Wall Base Ventilation System Applied at Different Wall Geometries—Numerical Simulation of the Evaporative Process

2012 ◽  
Vol 30 (1) ◽  
pp. 1-12 ◽  
Author(s):  
J. M. P. Q. Delgado ◽  
A. S. Guimarães ◽  
V. P. de Freitas
Keyword(s):  
Numerical Simulation ◽  
Ventilation System

Study on the Integrated Design of Underground Construction Lighting and Ventilation System

2011 ◽  
Vol 374-377 ◽  
pp. 702-705
Author(s):  
Wei Feng ◽  
Hui Min Li
Keyword(s):  
Numerical Simulation ◽  
Thermal Environment ◽  
Ventilation System ◽  
Integrated Design ◽  
Structure Design ◽  
Light Environment ◽  
System Model ◽  
Underground Construction ◽  
New Type

In the underground building, Light environment and thermal environment is poorer, in order to improve the problem, this paper brings forward a new type of lighting and ventilation system model; discusses the principle and characteristics of transmission; and analyses the question that influences lighting and ventilated effect in the application. Structure design and numerical simulation is the focus of the next step.

Research of Armored Vehicle Cabin Environment Comprehensive Evaluation

2014 ◽  
Vol 610 ◽  
pp. 136-141
Author(s):  
Wei Ping Liu ◽  
Xian Zhi Yan ◽  
Guan Sheng Huang ◽  
Yi Jin
Keyword(s):  
Comprehensive Evaluation ◽  
Weighted Average ◽  
Fuzzy Comprehensive Evaluation ◽  
Analytic Hierarchy ◽  
Vehicle Cabin ◽  
Military Vehicle ◽  
Armored Vehicle ◽  
Cabin Environment ◽  
Environment Parameters ◽  
Hierarchy Process

According to the characteristics and demand of the armored vehicle cabin environment evaluation, the cabin environment parameters are processed the method of dimensionless normalized processing, the weight coefficients of each parameters are evaluated by using analytic hierarchy process (AHP), the result vector of fuzzy comprehensive evaluation is analyzed by using weighted average principle, the result is ideal. At the same time, considering the problems of the fuzzy comprehensive evaluation and the particularity of military vehicle evaluation, the ultra limit additional evaluation is proposed.

Experimental and Numerical Investigation of Automotive Wind Throb Phenomenon

2011 ◽  
Author(s):  
Keiichiro Iida ◽  
Yoshimitsu Hashizume ◽  
Hiroshi Narita ◽  
Long Wu ◽  
Ganapathi Balasubramanian ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
A Priori ◽  
Experimental Results ◽  
Resonance Phenomenon ◽  
Strong Wind ◽  
Passenger Cars ◽  
Vehicle Cabin ◽  
Wind Speeds ◽  
Highly Sensitive ◽  
High Sound

Sunroof wind throb can generate annoyingly high sound-pressure levels (SPL) inside the vehicle cabin. In this study, several deflector configurations were installed to investigate this flow-acoustic coupled resonance phenomenon in passenger cars. In each condition, comparisons between the experimental results and numerical simulations were performed over a range of wind speeds to validate the capability of the PowerFLOW numerical simulation for wind throb prediction. Experiments were performed at the Suzuki full scale wind tunnel. One microphone in the cabin was set to record the pressure history and SPL. Flow around the sunroof was also measured by PIV. In both experiments and simulations, the following phenomena were observed. In case of strong wind throb, flow separates from the deflector and strong periodic vortices in the shear layer were observed. These vortices break down due to the impingement at the back-end of the sunroof and generate a strong peak noise in the cabin. In case of no wind throb, the periodic vortices were not observed resulting in a very weak peak with low SPL in the cabin. The deflector study shows that wind throb is a highly sensitive phenomenon where even a small geometry variation at the critical region can affect the phenomenon significantly. In this study, the same trend was obtained in the experimental results and simulations. It shows that the numerical simulation can be used for a priori predictions in the early stages of the vehicle design process.

Numerical Simulation of Dynamic Emergency Rescue and Regularities during Mine Fire Period

2012 ◽  
Vol 619 ◽  
pp. 336-341
Author(s):  
Zhong An Jiang ◽  
Wang Yi
Keyword(s):  
Numerical Simulation ◽  
Ventilation System ◽  
Junction Temperature ◽  
Buoyancy Effect ◽  
Gis Technology ◽  
Emergency Rescue ◽  
Mine Fire ◽  
Smoke Pollution ◽  
Pollution Area ◽  
Selection Of

Under the comprehensive consideration of “buoyancy effect” and “throttle effect” during mine fire period, the article used the geographic information system (GIS) technology, simulated the smoke pollution area, ventilation system junction temperature and state of airflow during mine fire period. Finishing a program for dynamic simulation of emergency rescue during mine fire period, which is significant for establishing fire pre-scheme and the decision-making during fire period. At the same time, the dynamic characteristic of ventilation system and selection of escaping route is also considered, which provides foundation for the rescuing the workers underground in time.

Sign in / Sign up

Export Citation Format

Share Document