Adaptive muffler based on controlled flow valves

Gas flow in plant microfluidic networks controlled by capillary valves.

The xylem vessels of trees constitute a model natural microfluidic system. In this work, we have studied the mechanism of air flow in the Populus xylem. The vessel microstructure was characterized by optical microscopy, transmission electronic microscopy (TEM), and atomic force microscopy (AFM) at different length scales. The xylem vessels have length ≈15 cm and diameter ≈20μm. Flow from one ve...

Flow Structures Generated by Pressure-controlled Self-oscillating Reed Valves

The #ow structures generated by a pressure-controlled self-oscillating valve are investigated both experimentally and numerically. Schlieren #ow visualization experiments show that a stable vortex is developed downstream of the valve during the closing phase of the valve. During the opening phase of the valve, this vortex moves downstream and dissipates. An experimental study of the vortex inte...

Modeling and experimental verification of a new muffler based on the theory of quarter-wavelength tube and the Helmholtz muffler

To address the problem of low frequency noise of the internal combustion engine, several existing muffler design methods, such as the theory of the quarter-wavelength tube and the Helmholtz muffler, were examined and compared. This paper proposes a new type of muffler design method, which has the advantages of both the quarter-wavelength tube and the Helmholtz muffler. An example is carried out...

Flow-Based Adaptive Information Integration

Assembling a coherent view of distributed heterogeneous information and their processing is challenging but important for inter-organizational business collaboration and service provision. However, traditional integration approaches do not consider dynamic and adaptive issues such as human intervention and exception handling. Therefore, we propose a Workflow-based Information Integration (WII) ...

Refrigerant Muffler Analysis