Journal of Textile Research ›› 2023, Vol. 44 ›› Issue (08): 189-196.doi: 10.13475/j.fzxb.20220301101

• Machinery & Accessories • Previous Articles     Next Articles

Structural design and air supply effect of directional uniform flow inlet in textile workshop

GAO Yihua1, QIAN Fuping2(), WANG Xiaowei1, WANG Huming3, GAO Jie3, LU Biao1, HAN Yunlong1   

  1. 1. School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, Anhui 243002, China
    2. School of Energy and Environment, Anhui University of Technology, Ma'anshan, Anhui 243002, China
    3. Jiangsu Jingya Group Co., Ltd., Wuxi, Jiangsu 214426, China
  • Received:2022-03-03 Revised:2023-04-18 Online:2023-08-15 Published:2023-09-21

RichHTML

5

PDF (PC)

36

Abstract:

Objective In response to the increasing requirements for steady temperature and humidity control in textile workshops, this study proposes a directional uniform flow inlet to meet the process requirements of different the workshop equipped with spinning-winding unit based on numerical and experimental studies. A comparison of the new air supply effect with the conventional mixed flow inlet is carried out to provide technical guidance for the actual engineering design.

Method A combination of numerical simulations and experiments was used to analyze the airflow organization of the directional uniform flow inlet and the conventional mixed flow inlet with different equipment arrangements. ANSYS Fluent was used to simulate the flow field in the defined area of the different air supply outlets. The airflow organization of the different air supply outlets was evaluated qualitatively and quantitatively using velocity, temperature, relative humidity, and distribution deviation coefficients. Based on this, an experimental benchmark was set up to compare the airflow effects so as to verify the feasibility of the numerical simulation in the textile workshop and to evaluate the respective airflow effects using the velocity and temperature distribution deviation coefficients.

Results The simulated and experimental results of the temperature distribution for the directional uniform flow inlet showed high agreement with each other, which verified the effectiveness of the numerical model used. In terms of velocity distribution, (Fig. 3, 4), the directional uniform flow inlet had a more even airflow distribution due to the presence of the split blades, ensuring the airflow range meeting the requirements of the working area. The velocity showed a trend of being lower at both ends and higher in the middle, with a relatively gentle curve. The velocity was higher the winder area than in the spinner area in the model, demonstrating the capability of the new design for air volume distribution for a small environment. In contrast, the conventional mixed flow inlet did not have dispersed airflow, and the outflow direction was mostly on both ends. Due to the convergence phenomenon caused by the partial airflow passing through the air-supply structure, the velocity distribution was high at both ends and low in the middle, with considerable fluctuation in the spinner area. The velocity deviation coefficients for the two types of inlet were 0.209 3 and 0.088 9 respectively, indicating that the directional uniform flow inlet had a more even airflow velocity distribution. In terms of the temperature and humidity distribution in the calculation domain (Fig. 5, 6, 7), the mixed flow inlet exhibited local areas with obvious fluctuation in both temperatures and humidity due to unreasonable regulation of the air volume under different equipment heat dissipation situations. The directional uniform flow inlet had a uniform temperature and humidity distribution in each area due to the implementation of the split blades and the equal-flow guide plate. The new design was proven to meet the required environmental conditions of the winder area with low temperature and high humidity and the spinner area with high temperature and low humidity. The average temperature deviation coefficients for the two types of inlet were 0.015 2 and 0.008 3 respectively. Therefore, the directional uniform flow inlet had a more uniform temperature distribution.

Conclusion In summary, the airflow organization of the directional uniform flow inlet proposed in this paper is more uniform than traditional composite type mixed flow inlet. The temperature and humidity in all areas generally meet the required environmental requirements. Its set of the split blades and the equal-flow guide plate can achieve small environmental adjustment and directional air supply under different equipment arrangements. Its average deviation coefficient of velocity and temperature is smaller than that of the conventional mixed flow inlet, so the directional uniform flow inlet will have a better air supply effect in engineering applications.

Key words: textile workshop, spinning-winding unit, air-conditioning, air outlet structure, numerical simulation, temperature and humidity control

CLC Number: 

  • TH12

Fig. 1

Geometric models of directional uniform flow inlet(a) and composite type mixed flow inlet(b)"

Fig. 2

Schematic diagram of four sets of measuring points on vertical plane and horizontal plane"

Fig. 3

Vector diagram of velocity of air outlet in Z=1 m section. (a) Composite type mixed flow inlet; (b) Directional uniform flow inlet"

Fig. 4

Velocity distribution of each measuring point under two types of air supply outlets"

Fig. 5

Temperature distribution of each measuring point under two types of air supply outlets"

Fig. 6

Relative humidity distribution of each measuring point under two types of air supply outlets"

Fig. 7

Horizontal surface temperature distribution at different heights for three calculation models"

Fig. 8

Relative humidity distribution on surface of equipment"

Fig. 9

Velocity values of the measuring point at different air supply speeds"

Fig. 10

Temperature values of measuring points at different supply air temperature"

[1] 杨纪超. 满怀信心迎接中国纺织工业新时代[J]. 棉纺织技术, 2020, 48(1): 2-3.
YANG jichao. Meet a new era in China's textile industry with confidence[J]. Cotton Textile Technology, 2022, 48(1): 2-3.
[2] WANG L, LI Y, HE W J E. The energy footprint of China's textile industry: perspectives from decoupling and decomposition analysis[J]. Energies, 2017, 10(10): 1461-1471.
doi: 10.3390/en10101461
[3] ZHAO H. Annual economic report (2019) for China's technical textile industry in brief[J]. China Textile, 2020, 15(2): 32-33.
[4] 张晓静, 王仕元, 周义德, 等. 新型细纱车间空调气流组织设计[J]. 上海纺织科技, 2021, 49 (1):61-64.
ZHANG Xiaojing, WANG Shiyuan, ZHOU Yide, et al. Air conditioning organization design for new spinning workshop[J]. Shanghai Textile Science & Technology, 2021, 49 (1): 61-64.
[5] 周铸, 黄江涛, 黄勇, 等. CFD技术在航空工程领域的应用、挑战与发展[J]. 航空学报, 2017, 38(3): 6-30.
ZHOU Zhu, HUANG Jiangtao, HUANG Yong, et al. CFD technology in aeronautic engineering field: applications, challenges and development[J]. Acta Aeronautica et Astronautica Sinica, 2017, 38(3): 6-30.
[6] ELDEGWY A, KHALIL E E. Simulation of air flow pattern in a room with ceiling mounted circulator[C]// 55th AIAA Aerospace Sciences Meeting. Texas: AIAA Science and Technology Forum, 2017: 9-13.
[7] AL-HABABI T, KHALIL E E. Numerical investigations of flow patterns and thermal comfort in air-conditioned gymnastic sport facility[C]// 54th AIAA Aerospace Sciences Meeting. California: AIAA Science and Technology Forum, 2016: 1-7.
[8] THONGSRI J. A successful CFD-based solution to a water condensation problem in a hard disk drive factory[J]. IEEE Access, 2017, 5: 10795-10804.
doi: 10.1109/ACCESS.2017.2708138
[9] 王晓维, 汪虎明, 高杰, 等. 基于CFD技术纺织空调送风口结构的优化设计[J]. 流体机械, 2020, 48(8): 65-70.
doi: 10.3969/j.issn.1005-0329.2020.08.012
WANG Xiaowei, WANG Minghu, GAO Jie, et al. Optimization design of air supply structure of textile air conditioning based on CFD technology[J]. Fluid Machinery, 2020, 48(8): 65-70.
doi: 10.3969/j.issn.1005-0329.2020.08.012
[10] 杨瑞梁, 周义德, 高龙, 等. 多层面可调混流空气分布器: CN200710189782.8[P]. 2003-03-19.
YANG Ruiliang, ZHOU Yide, GAO Long, et al. Multi-level adjustable mixed flow air distributor: CN 200710189782.8[P]. 2003-03-19.
[11] 夏强. 纺织空调复合式混流送风口: CN201720063417.1[P]. 2017-09-12.
XIA Qiang. Textile air conditioning composite mixed flow air supply: CN 201720063417.1[P]. 2017-09-12.
[12] 惠晶. 细纱车间温湿度、回潮率分析及改进[J]. 天津纺织科技, 2018, 5(2): 31-33.
HUI Jing. Analysis and rectification suggestions of temperature and humidity, moisture regain rate in spinning workshop[J]. Tianjin Textile Science & Technology, 2018, 5(2): 31-33.
[13] AHMED A, MOHAMED H. MOHAMEDA M F. Optimal design of a louver face ceiling diffuser using CFD to improve occupant's thermal comfort[J]. Journal of Building Engineering, 2017, 11(5): 134-157.
doi: 10.1016/j.jobe.2017.04.009
[14] SU Y X, WAN X. Numerical simulation of the natural ventilation in work-shop with different air inlet openings[J]. Advanced Materials Research, 2011, 250-253: 3187-3190.
[15] El-AMIN M F, SUN S, HEIDEMANN W, et al. Analysis of a turbulent buoyant confined jet modeled using realizable k-ε model[J]. Heat and Mass Transfer, 2010, 46(8): 943-960.
doi: 10.1007/s00231-010-0625-3
[16] ANSYS I. Ansys Fluent theory guide[M]. Pittsburgh: ANSYS Inc, 2011: 197.
[17] CHAPMAN S, COWLING T G. The mathematical theory of non-uniform gases: an account of the kinetic theory of viscosity, thermal conduction and diffusion in gases[J]. Mathematical Gazette, 1952, 38: 323.
[18] 赵荣义, 范存养, 薛殿华, 等. 空气调节[M]. 4版. 北京: 中国建筑工业出版社, 2009, 182.
ZHAO Rongyi, FAN Cunyang, XUE Dianhua, et al. Air conditioning[M]. 4th ed. Beijing: China Construction Industry Press, 2009: 182.
[1] LU Weijian, TU Jiajia, WANG Junru, HAN Sijie, SHI Weimin. Model for empty bobbin recognition based on improved residual network [J]. Journal of Textile Research, 2024, 45(01): 194-202.
[2] WANG Qing, LIANG Gaoxiang, YIN Junqing, SHENG Xiaochao, LÜ Xushan, DANG Shuai. Establishment of novel model and performance analysis of airflow drafting channel [J]. Journal of Textile Research, 2023, 44(11): 52-60.
[3] YANG Mengxiang, LIU Rangtong, LI Liang, LIU Shuping, LI Shujing. Heat transfer and thermal protection properties under strong thermal conditions of woven fabrics [J]. Journal of Textile Research, 2023, 44(11): 74-82.
[4] WU Junqiu, LI Jun, WANG Min. Research progress in heat and moisture transfer model construction and application of cooling clothing incorporated with phase change materials [J]. Journal of Textile Research, 2023, 44(08): 234-241.
[5] LIAN Liping, YANG Pengcheng, YU Zijian, LONG Yangzhao, XIAO Yuan. Numerical simulation for selecting laser parameters in marking process with different fabrics [J]. Journal of Textile Research, 2023, 44(06): 121-128.
[6] MIAO Ying, XIONG Shiman, ZHENG Minbo, TANG Jiandong, ZHANG Huixia, DING Cailing, XIA Zhigang. Effect of high smooth treatment on polyimide staple yarns and its fabric properties [J]. Journal of Textile Research, 2023, 44(02): 118-127.
[7] SUN Jian, JIANG Boyi, ZHANG Shoujing, HU Sheng. Influence of different nozzle structures and parameters on nozzle performance of foreign fiber sorters [J]. Journal of Textile Research, 2022, 43(10): 169-175.
[8] ZHU Wenni, XU Runnan, HU Diefei, YAO Juming, MILITKY Jiri, KREMENAKOVA Dana, ZHU Guocheng. Simulation analysis of filtration characteristics of fiber materials based on random algorithm [J]. Journal of Textile Research, 2022, 43(09): 76-81.
[9] YU Yukun, SUN Yue, HOU Jue, LIU Zheng, YICK Kitlun. Dynamic finite element modeling and simulation of single layer clothing ease allowance [J]. Journal of Textile Research, 2022, 43(04): 124-132.
[10] LIU Yisheng, ZHOU Xinlei, LIU Dandan. Effect of yarn's initial position on yarn tucked-in in pneumatic tucked-in selvedge apparatus [J]. Journal of Textile Research, 2022, 43(03): 168-175.
[11] QIAN Miao, HU Hengdie, XIANG Zhong, MA Chengzhang, HU Xudong. Flow and heat transfer characteristics of non-uniform heat-pipe heat exchanger [J]. Journal of Textile Research, 2021, 42(12): 151-158.
[12] ZHOU Haobang, SHEN Min, YU Lianqing, XIAO Shichao. Effect of structural parameter of relay nozzles on characteristics of flow field in profiled reed of air jet loom [J]. Journal of Textile Research, 2021, 42(11): 166-172.
[13] MOU Haolei, XIE Jiang, PEI Hui, FENG Zhenyu, GENG Hongzhang. Ballistic impact tests and numerical simulation of aramid fabric and containment ring [J]. Journal of Textile Research, 2021, 42(11): 56-63.
[14] SHI Qianqian, WANG Jiang, ZHANG Yuze, LIN Huiting, WANG Jun. Numerical analysis on formation mechanism of airflow field in rotor spinning unit [J]. Journal of Textile Research, 2021, 42(02): 180-184.
[15] CHU Xi, QIU Hua. Flow simulations of ring swirl nozzle under different inlet pressure conditions [J]. Journal of Textile Research, 2020, 41(09): 33-38.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
京ICP备14006648号
Copyright 2021 © Editorial office of Journal of Textile Research
Supported by Beijing Magtech Co.Ltd