Turbo jet engine nozzle design optimization to reduce noise

2nd International Conference on Advancements in Aeromechanical Materials for Manufacturing

航空航天工程;材料科学;机械制造

Phaneendra, Vadla^1 ; Sreekanth, S.^1

Dept. of Aeronautical Engineering, MLR Institute of Technology, Hyderabad

500043, India^1

关键词: Air pressures;    Air-jet nozzles;    Design and Development;    Design optimization;    Design parameters;    Polyester yarn;    Rectangular shapes;    Regular rings;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/455/1/012043/pdf
DOI  :  10.1088/1757-899X/455/1/012043

来源: IOP

【 摘 要 】

An attempt has been made through this research work for developing single air jet nozzles and the production of single jet yarns using newly developed single head single jet yarn spinning unit. The fiber losses and end breakages during the production of sliver fed and roving fed 40s Ne cotton, 50s Ne viscose and 60s Ne polyester single jet yarns were observed in designed 21 nozzles. Regular ring yarns, Suessen regular compact yarns and newly introduced Suessen D-slot compact yarns, Murata air jet yarn and Murata air vortex yarns were produced and compared with single jet yarns. The design and development of single jet nozzle was carried out in three phases in this research work. The developed nozzles consist of air inlet chamber, wrapper fiber chamber, false twist chamber and fascinated yarn chamber. In the first phase, 1-11 Nozzles were developed with different dimensions. In the second phase 12-16 nozzles were developed with Inner flanged type wrapper fiber chambers in various air feed angle such as 45o, 50o, 55o, 60 o and 65o. In third phase 17-21 nozzles were developed with rectangular shape type wrapper fibre chambers in various air feed angle such as 45o, 50o, 55o, 60 o and 65o.Using experiment and slip-up principle, trails were conducted using above 21 developed nozzles. Single head single jet spinning unit has been designed and developed. It consists of drafting zone, air jet nozzle zone and winding zone. With the help of servo motor arrangements and 4/4 drafting system, it was designed to provide the draft range of 10-250 and to run the unit up to 150 m/min. Developed nozzles were critically analyzed and significance of sliver feeding over roving feeding using 40s Ne cotton, 50s Ne viscose and 60s Ne polyester yarns were analyzed. Through the various developed nozzles, design parameters such as two different wrapper fibre chambers, five different air feed angle and five air pressures totally 300 samples were produced.