Dual Flow Reference Nozzles for Verification of Sub-Scale Thrust and Airflow Test Rigs: Dual Separate Flow Reference (DSFR) and Dual Mixed Flow Reference (DMFR) (AIAA R-146-2020)

In the differential equation of the overland turbulent flow which was first postulated by Horton, Eq.(6), the value of c equals 5/3. For this value of c, the flow equation could not be integrated algebraically. Horton solved the equation for c = 2 and believed that his solution was valid for mixed flow. The flow equation with c = 5/3 is solved algebraically herein. It is shown elsewhere (Gill 1976) that the flow equation can indeed be integrated for any rational value of c.

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Cloud-Edge Collaboration-Based Knowledge Sharing Mechanism for Manufacturing Resources

Applied Sciences ◽

10.3390/app11073188 ◽

2021 ◽

Vol 11 (7) ◽

pp. 3188

Author(s):

Xixiang Wang ◽

Jiafu Wan

Keyword(s):

Knowledge Sharing ◽

Comparative Experiment ◽

Mixed Flow ◽

Processing Technologies ◽

Experiment Platform ◽

Low Degree ◽

Manufacturing Resources ◽

Ontological Model ◽

Manufacturing Environments ◽

Similar Processing

The development of multi-variety, mixed-flow manufacturing environments is hampered by a low degree of automation in information and empirical parameters’ reuse among similar processing technologies. This paper proposes a mechanism for knowledge sharing between manufacturing resources that is based on cloud-edge collaboration. The manufacturing process knowledge is coded using an ontological model, based on which the manufacturing task is refined and decomposed to the lowest-granularity concepts, i.e., knowledge primitives. On this basis, the learning process between devices is realized by effectively screening, matching, and combining the existing knowledge primitives contained in the knowledge base deployed on the cloud and the edge. The proposed method’s effectiveness was verified through a comparative experiment contrasting manual configuration and knowledge sharing configuration on a multi-variety, small-batch manufacturing experiment platform.

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Layout design of a mixed-flow production line based on processing energy consumption and buffer configuration

Advances in Manufacturing ◽

10.1007/s40436-021-00354-1 ◽

2021 ◽

Author(s):

Cai-Xia Zhang ◽

Shu-Lin Dong ◽

Hong-Yan Chu ◽

Guo-Zhi Ding ◽

Zhi-Feng Liu ◽

...

Keyword(s):

Energy Consumption ◽

Production Line ◽

Layout Design ◽

Mixed Flow ◽

Processing Energy

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Dual Flow Reference Nozzles for Verification of Sub-Scale Thrust and Airflow Test Rigs: Dual Separate Flow Reference (DSFR) and Dual Mixed Flow Reference (DMFR) (AIAA R-146-2020)