Transient simulation in interior flow field of lobe pump

Li, Y B; Sang, Xiaohu; Meng, Qingjun; Shen, Hong; Jia, K

doi:10.1088/1757-899x/52/3/032019

Cited by 2 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth noticing that the profile that the optimization proffers has a great impact on the efficiency, thus suggesting that the optimization effect's influence on the pressure pulsation is not as ideal. To effectively enhance the pressure pulsation with a straight blade rotor, the rotor structure could be utilized to convert it from a straight to a torsional blade rotor [16,17] or perhaps to augment the number of blades [18]. Meanwhile, the torsional blade rotor possesses the quality of higher stability and reduced pressure pulsation; however, to some extent, the efficiency might be lost.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Reflux Groove Structures on the Flow Characteristics of the Roots Pump

Xing

Zhang²,

Fang³

et al. 2022

Machines

View full text Add to dashboard Cite

A Roots pump often exhibits the typical characteristics of high gas pressure in the exhaust port, low pressure at a basic volume and large airflow pulsation at the outlet as a result of gas reflux. In light of this, this study employed Pumplinx software for the numerical calculation of the entire flow field of a two-bladed Roots pump. The effects of the rectangular and curved reflux groove structures on the internal flow field of a Roots pump, especially on the outlet pressure pulsation and flow rate, were unveiled separately. The rectangular reflux groove controlled the angle and thickness, while the curved reflux groove regulated the coordinates of the key points on the Bezier curve. It is worth recognizing that different reflux groove structures were not noticeable in enhancing the inlet measurement flow pattern; reduce the exhaust pressure pulsation, flow pulsation and exhaust section vortex. Interestingly, the rectangular return groove far outweighed the curved groove when optimizing the pressure and flow pulsation when registering the higher flow loss compared to the curved return groove. The merits and demerits of the Q criterion and omega criterion in characterizing the vortex structure of the flow field in the Roots pump were compared by Tecplot software. The omega criterion looked more robust, clear and continuous in revealing the strong and weak vortices in the Roots pump. The outcome of this research work could provide a reference for the study of Roots pump airflow pulsation, vortex analysis and casing structure design optimization.

show abstract

Section: Introductionmentioning

confidence: 99%