流水混流之非線性現象

Nonlinearity on Flow Mixing

留彰徽(Zhang Hui Liu)

指導教授 ： 潘瑋

國立中正大學/理學院/物理學系/碩士(2014年)

摘要

本研究要研究不可壓縮流體匯流的現象。在封閉管內流體的流量與管面積、壓力、出水孔大小有關，然而改變出水口的面積大小，使流體匯流之後的總流量改變，混管的比例出現非線性現象，也就是說，混管的比例，會隨著為總流量改變而變化。從我們的實驗中找出兩水管混流之後，其混合比例與出水口面積大小的關係，並驗證兩水管混流並非由兩個單一管管流的線性疊加。

從實驗中觀察得知，當兩個入水孔徑不同的管道混流後，若出水口的截面積發生變化時，兩入水口混合比例會偏向其中一個入水口，表示當在下游發生變化，便會影響上游各支流的水流量。藉由這個研究，若能了解下游的變化，便能預測上游混流後的流量比例，應用在各種混流有關的系統上。

關鍵字

非線性 ； 流水混流

並列摘要

This research was about the flow mixing of incompressible flow. The volume rate of flow in the closed pipe is related to the sectional area of the pipes and dynamic pressures. However, the volume rate of flow will change if the size of outlet changed. We found the nonlinear relationship between the volume rate of flow and the size of outlet. In experiment we try to prove that, the mixed pipes flow is not superposition of two single pipe flow.

Observation by the experiment as we know, after mixed the two different size of the inlet. The proportion of two inlet flow will biased one of them if the sectional area of the outlet has changed. That mean the downstream has changed that will influence the every tributaries of upstream.

With this study, will be able to predict the ratio of the upstream flow if we can understand the downstream change, and application in a variety of mixed-related systems.

並列關鍵字

Nonlinearity ； Flow Mixing

參考文獻

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