| Civil and Mechanical Engineering |
|
|
|
|
| Impact of load impedance on the performance of a thermoacoustic system employing acoustic pressure amplifier |
| Ke TANG, Zhong-jie HUANG, Tao JIN, Guo-bang CHEN |
| Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China |
|
|
|
Abstract An acoustic pressure amplifier (APA) is capable of improving the match between a thermoacoustic engine and a load by elevating pressure ratio and acoustic power output. A standing-wave thermoacoustic engine driving a resistance-and-compliance (RC) load through an APA was simulated with linear thermoacoustics to study the impact of load impedance on the performance of the thermoacoustic system. Based on the simulation results, analysis focuses on the distribution of pressure amplitude and velocity amplitude in APA with an RC load of diverse acoustic resistances and compliance impedances. Variation of operating parameters, including pressure ratio, acoustic power, hot end temperature of stack, etc., versus impedance of the RC load is presented and analyzed according to the abovementioned distribution. A verifying experiment has been performed, which indicates that the simulation can roughly predict the system operation in the fundamental-frequency mode.
|
|
Received: 10 June 2007
Published: 14 December 2007
|
|
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
