Transmission Matrix Model of a Quarter-Wave-Tube with Gas Temperature Gradients
نویسنده
چکیده
A transmission matrix (also known as four pole) model is presented of a duct with anechoic terminations and a quarter-wave-tube, where each duct segment has a linear temperature gradient. The results from simulations conducted using the mathematical model show good agreement with results from finite element simulations using Ansys. Expressions are derived for the four pole analysis method that are relevant when conducting finite element simulations where an incident acoustic particle velocity is specified as the excitation source. A static thermal finite element analysis is conducted using thermal solid elements to determine the nodal temperatures. The nodal temperatures are transferred to the nodes of the acoustic elements and a harmonic analysis is conducted to determine the pressure within the duct.
منابع مشابه
Parasitic Effect of Tube Wall Longitudinal Heat Conduction on Cryogenic Gas Temperature
Longitudinal heat conduction is an important parameter in the cryogenic field, especially in cryogenic heat exchangers. In the present work, the parasitic effect of tube wall longitudinal heat conduction on temperature measurement has been studied in cryogenic laminar hydrogen flow. The effects of various parameters such as wall cold end temperature, wall thermal conductivity, gas volumetric fl...
متن کاملDevelopment of Forward-wave Directional Couplers Loaded by Periodic Shunt Shorted Stubs
In this paper a new procedure for designing forward-wave directional couplers using periodic shunt short circuited stubs is proposed. A new type of cell using these stubs, which enlarge the phase difference between even- and odd modes of a uniform microstrip coupled line is introduced. Using the equivalent circuit model for even- and odd-modes of the proposed cell, the elements of the ABCD tra...
متن کاملAcousto-Refrigerator with an Adjustable Mechanical Resonator (RESEARCH NOTE)
Thermoacoustics describes energy conversion processes, activated by interaction temperature oscillation, accompanying the pressure oscillation in a sound wave, with solid boundaries. In ordinary experience this interaction of sound and heat cannot be observed, because of the very low temperature differences, but under suitable conditions, it can be emphasized and amplified to create remarkable ...
متن کاملNoise reduction using a quarter wave tube with different orifice geometries
It is well known that the acoustic performance of silencing elements decreases with an increase in exhaust gas flow. Tests were conducted on three orifice geometries of side-branches on an adaptive quarter-wave tube to determine which was the least compromised by the high-speed exhaust gas passing over the side-branch. The side-branch geometries that were tested were a sharp edge, a backward in...
متن کاملElectronic Transmission Wave Function of Disordered Graphene by Direct Method and Green's Function Method
We describe how to obtain electronic transport properties of disordered graphene, including the tight binding model and nearest neighbor hopping. We present a new method for computing, electronic transport wave function and Greens function of the disordered Graphene. In this method, based on the small rectangular approximation, break up the potential barriers in to small parts. Then using the f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2013