Simulation of the Screw Thread Connection Temperature Field Based on ANSYS

2013 ◽  
Vol 440 ◽  
pp. 204-209
Author(s):  
Fu Sun ◽  
Xiao Lei Wu ◽  
Shi Feng Yao ◽  
Guang Ye Liang
Keyword(s):  
Thermal Analysis ◽  
Temperature Field ◽  
High Temperature ◽  
Screw Thread ◽  
Significant Safety ◽  
Thread Connection ◽  
Safety Issues ◽  
Thread Surface ◽  
Complex Process ◽  
The Relationship

Friction of screw thread connection will cause temperature rise while projectile unloading, Too high temperature which would cause the combustion will result in significant safety issues, so the temperature field of screw thread connection must be analyzed when the projectile unloading. But friction is a complex process, how to simulate the temperature change accurately is the key link of the whole analysis. In this paper, friction of the screw thread surface in the process of unloading is simulated based on thermal analysis function of ANSYS. According to temperature distribution of the screw thread surface, the highest temperature and position of the highest temperature point is determined. The relationship between temperature and different speed is analyzed, which can provide a theory basis for safely unloading.

Temperature Field in Electric Control Unit of Diesel Engine and its Optimization Design

2011 ◽  
Vol 340 ◽  
pp. 76-80
Author(s):  
Zhen Jie Liu ◽  
Yu Long Lei ◽  
Yong Jun Li
Keyword(s):  
Thermal Analysis ◽  
Temperature Field ◽  
High Temperature ◽  
Diesel Engine ◽  
Structural Optimization ◽  
Optimization Design ◽  
High Reliability ◽  
Control Unit ◽  
Operating Conditions ◽  
Electric Control

In order to satisfy the requirements of the high reliability of electric control unit (ECU) of the Diesel Engine, the thermal analysis of ECU was performed by using the software FLOTHERM based on the finite volume method. The temperature field of ECU was obtained under different operating conditions. The structural optimization of ECU was completed to solve the problem of local high temperature. As a result, the operational temperature of ECU is reduced under the allowable limit, and its reliability is improved. The physical experiment shows that the thermal analysis and structural optimization are valid. The local high temperature could be reduced effectively and the operational reliability is improved.

scholarly journals Modeling the Temperature Field in the Ground with an Installed Slinky-Coil Heat Exchanger

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4010
Author(s):  
Monika Gwadera ◽  
Krzysztof Kupiec
Keyword(s):  
Temperature Field ◽  
Heat Exchanger ◽  
Surface Temperature ◽  
Ground Surface ◽  
Heat Sources ◽  
Ground Surface Temperature ◽  
Coil Heat Exchanger ◽  
The Relationship ◽  
Temperature Responses ◽  
Coil Heat

In order to find the temperature field in the ground with a heat exchanger, it is necessary to determine temperature responses of the ground caused by heat sources and the influence of the environment. To determine the latter, a new model of heat transfer in the ground under natural conditions was developed. The heat flux of the evaporation of moisture from the ground was described by the relationship taking into account the annual amount of rainfall. The analytical solution for the equations of this model is presented. Under the conditions for which the calculations were performed, the following data were obtained: the average ground surface temperature Tsm = 10.67 °C, the ground surface temperature amplitude As = 13.88 K, and the phase angle Ps = 0.202 rad. This method makes it possible to easily determine the undisturbed ground temperature at any depth and at any time. This solution was used to find the temperature field in the ground with an installed slinky-coil heat exchanger that consisted of 63 coils. The results of calculations according to the presented model were compared with the results of measurements from the literature. The 3D model for the ground with an installed heat exchanger enables the analysis of the influence of miscellaneous parameters of the process of extracting or supplying heat from/to the ground on its temperature field.

scholarly journals The modification effect of temperature on the relationship between air pollutants and daily incidence of influenza in Ningbo, China

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Rui Zhang ◽  
Yujie Meng ◽  
Hejia Song ◽  
Ran Niu ◽  
Yu Wang ◽  
...  
Keyword(s):  
Air Pollution ◽  
High Temperature ◽  
Air Pollutants ◽  
Meteorological Data ◽  
Effect Of Temperature ◽  
Distributed Lag ◽  
Modification Effect ◽  
Incidence Risk ◽  
The Impact ◽  
The Relationship

Abstract Background Although exposure to air pollution has been linked to many health issues, few studies have quantified the modification effect of temperature on the relationship between air pollutants and daily incidence of influenza in Ningbo, China. Methods The data of daily incidence of influenza and the relevant meteorological data and air pollution data in Ningbo from 2014 to 2017 were retrieved. Low, medium and high temperature layers were stratified by the daily mean temperature with 25th and 75th percentiles. The potential modification effect of temperature on the relationship between air pollutants and daily incidence of influenza in Ningbo was investigated through analyzing the effects of air pollutants stratified by temperature stratum using distributed lag non-linear model (DLNM). Stratified analysis by sex and age were also conducted. Results Overall, a 10 μg/m3 increment of O3, PM2.5, PM10 and NO2 could increase the incidence risk of influenza with the cumulative relative risk of 1.028 (95% CI 1.007, 1.050), 1.061 (95% CI 1.004, 1.122), 1.043 (95% CI 1.003, 1.085), and 1.118 (95% CI 1.028, 1.216), respectively. Male and aged 7–17 years were more sensitive to air pollutants. Through the temperature stratification analysis, we found that temperature could modify the impacts of air pollution on daily incidence of influenza with high temperature exacerbating the impact of air pollutants. At high temperature layer, male and the groups aged 0–6 years and 18–64 years were more sensitive to air pollution. Conclusion Temperature modified the relationship between air pollution and daily incidence of influenza and high temperature would exacerbate the effects of air pollutants in Ningbo.

High-Temperature Behavior and Surface Chemistry of Carbide MXenes Studied by Thermal Analysis

2019 ◽  
Vol 31 (9) ◽  
pp. 3324-3332 ◽  
Author(s):  
Mykola Seredych ◽  
Christopher Eugene Shuck ◽  
David Pinto ◽  
Mohamed Alhabeb ◽  
Eliot Precetti ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
High Temperature ◽  
Surface Chemistry ◽  
Temperature Behavior ◽  
High Temperature Behavior

Influence of Enzyme Activity of Bacteria and Leucocytes in Raw Milk on Age Gelation after UHT Processing

1984 ◽  
Vol 47 (2) ◽  
pp. 105-107 ◽  
Author(s):  
BARBARA P. KEOGH ◽  
G. PETTINGILL
Keyword(s):  
Enzyme Activity ◽  
High Temperature ◽  
Inhibitory Action ◽  
Raw Milk ◽  
Bacterial Counts ◽  
High Temperature Processing ◽  
The Relationship ◽  
Ultra High Temperature

An investigation was undertaken into the relationship between the enzyme activity of cells harvested from raw milk and time taken for age gelation (TAG) to occur in the milk after ultra-high-temperature processing. It was shown that there was no relationship between the TAG and the bacterial counts on milk agar at 30°C or 7°C nor was there a relationship between the counts and the level of enzyme activity of the harvested cells. There was, however, a significant correlation between the level of enzyme activity of the harvested cells and the TAG. When extra bovine leucocytes were added to raw milk before processing, the TAG was increased. This suggested that there was an inhibitory action of leucocytes in development of age gelation.

Influence of powder characteristics on the properties of green compacts of Bi-2212 powders

1997 ◽  
Vol 12 (1) ◽  
pp. 21-27 ◽  
Author(s):  
D.-W. Yuan ◽  
M. D. Aesoph ◽  
J. Kajuch
Keyword(s):  
High Temperature ◽  
Confining Pressure ◽  
Plastic Behavior ◽  
Particle Sizes ◽  
Green Density ◽  
High Temperature Superconducting ◽  
Powder Characteristics ◽  
The Relationship ◽  
Powder In Tube ◽  
Superconducting Applications

With the growing potential for use of Bi-2212 powders in high temperature superconducting applications, it is important to understand the processing characteristics of the material. To meet this need, the present work established the relationship between confining pressure and green density for powders of different particle sizes and morphologies. Mechanical properties, including elastic and plastic behavior, of the resulting green compacts were also measured as a function of relative density. Particle size and size distribution are shown to have a significant impact on the properties of interest. The implications of such findings are discussed with respect to the powder-in-tube process for making high temperature superconducting wire and tape.

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