Investigation on the Time Error of Detonation Acoustic in Process of Formation and Propagation
-
Gui-yang Xu
,
Chun-guang Wang
Abstract
The time error of detonation acoustic in process of detonation formation and propagation in a multi-cycle gas-liquid two-phase pulsed detonation engine is experimentally investigated. Results from the tests show that before the detonation wave escapes through the open-end of PDE tube, the maximum average arrival time error of detonation acoustic is achieved in the process of overdriven detonation. After detonation wave exists of PDE tube, arrival time error at 0 deg is greater than the other directivity angles in all distances and increases dramatically first and then almost stays at a certain value. The filling fraction has a major impact on the time error of detonation acoustic. With filling fraction increasing, there are increases in arrival time error and interval time error. Arrival time error with the highest filling fraction at 30 deg is much greater than other filling fraction. The convergent nozzle exhibits a marked suppression in the time error of detonation acoustic, where the maximum reductions of 62.02 percent and 56.13 percent are obtained in arrival time error and interval time error respectively.
Acknowledgements
The authors gratefully acknowledge the support of the Xi’an Modern Chemistry Research Institute and the National Key Lab of Transient Physics.
Nomenclature
- Pm
The mth sensor
The detonation acoustic arrival time at Pm in the nth test
The spark signal forming time in the nth test
The arrival time interval between Pm and spark
The average velocity of adjacent sensors
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Articles in the same Issue
- Frontmatter
- Original Research Articles
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- Parametric Modeling and Dynamic Characteristics Analysis of a Power Turbine Rotor System
- Operation Study of Miniature Air-blast Atomizer under Very Low Liquid Pressures
- Investigation on the Time Error of Detonation Acoustic in Process of Formation and Propagation
- Experimental Investigation of Pressure Fluctuations on Inner Wall of a Centrifugal Pump
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Articles in the same Issue
- Frontmatter
- Original Research Articles
- Design of a Compact Crossover Diffuser for Micro Gas Turbines Using a Mean-Line Code
- Parametric Modeling and Dynamic Characteristics Analysis of a Power Turbine Rotor System
- Operation Study of Miniature Air-blast Atomizer under Very Low Liquid Pressures
- Investigation on the Time Error of Detonation Acoustic in Process of Formation and Propagation
- Experimental Investigation of Pressure Fluctuations on Inner Wall of a Centrifugal Pump
- Numerical Analysis of Exhaust Emission from an Aero Gas Turbine Combustor under Fuel-Rich Condition
- Film Cooling Mechanism of Combined Hole and Saw-tooth Slot
- A Multi-Regulator Linear Matrix Inequalities Approach for Aircraft Engine Limit Management
- Direct Numerical Simulation of Turbine Cascade Flow with Heat Transfer
- Effect of Tip Configurations on Aerodynamic Performance of Variable Geometry Linear Turbine Cascade
