UCBO Hydraulic Oil and Application on Hydraulic Measurement for Laval Nozzle Throat Diameter

2015 ◽  
Vol 667 ◽  
pp. 449-454
Author(s):  
Yang Hong ◽  
Xiang Zhang ◽  
Dong Xiang Shao ◽  
Guang Lin Wang ◽  
Li Sun
Keyword(s):  
Laval Nozzle ◽  
Oxidation Stability ◽  
Measurement Model ◽  
Diameter Measurement ◽  
Liquid Pressure ◽  
Nozzle Throat ◽  
Hydraulic Oil ◽  
Temperature Performance ◽  
Measurement Principle ◽  
Throat Diameter

This paper proposes a hydraulic measurement model for measuring the Laval nozzle throat diameter size. Based on measurement principle of liquid pressure – flowrate, we can get the size of Laval nozzle throat diameter by measuring the fluid flowrate through hydraulic measurement model at the fixed pressure. With good viscosity-temperature performance, low temperature performance and oxidation stability, UCBO aviation hydraulic oil is selected as the measuring medium. In the hydraulic measurement model, the diameter of the mandrel which can be regarded as gauge will directly affect the sensitivity of diameter measurement. Therefore we need to optimize the design of the mandrel of the hydraulic model.

HLP Type Hydraulic Oil Analysis for Meso-Scale Hole Measurement

2015 ◽  
Vol 667 ◽  
pp. 427-432
Author(s):  
Xiang Zhang ◽  
Yang Hong ◽  
Guang Lin Wang ◽  
Dong Xiang Shao ◽  
Li Sun
Keyword(s):  
Flow Field ◽  
Measurement Method ◽  
Laval Nozzle ◽  
Measuring Method ◽  
Field Analysis ◽  
Nozzle Throat ◽  
Hydraulic Oil ◽  
Flow Field Analysis ◽  
Throat Diameter ◽  
Meso Scale

HLP type hydraulic oil has wide application in aerospace field. The existing measurement method of Laval nozzle throat diameter efficiency is low, and has the potential to cut parts surface. Therefore, a non-contact throat diameter measuring method based on the hydraulic oil is proposed. Then the flow field is simulated, and measurement parameters are calculated. The flow field analysis results show that this method is suitable for measuring Laval nozzle throat diameter.

scholarly journals The influence of Laval nozzle throat size on supersonic molecular beam injection

2014 ◽  
Vol 22 (2) ◽  
pp. 118-121 ◽  
Author(s):  
Xinkui He ◽  
Xianfu Feng ◽  
Mingmin Zhong ◽  
Fujun Gou ◽  
Shuiquan Deng ◽  
...  
Keyword(s):  
Molecular Beam ◽  
Laval Nozzle ◽  
Nozzle Throat ◽  
Supersonic Molecular Beam ◽  
Beam Injection

Non-Contact Measuring Modeling and Simulation of CNC Machine Tools under High Feed Rate Condition

2007 ◽  
Vol 10-12 ◽  
pp. 621-625
Author(s):  
X.S. Wang ◽  
Jian Guo Yang
Keyword(s):  
Feed Rate ◽  
Machine Tools ◽  
Laser Interferometer ◽  
Measurement Model ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Rate Condition ◽  
High Feed Rate ◽  
High Feed ◽  
Measurement Principle

This article sets forth a new precision measurement method of CNC machine tools. The method incorporates the laser interferometer and the measurement principle of the double ball bar (DBB), and can measure the machine tool precision under the high feed rate condition. The generalized measurement model of three-axis has been built. Data analysis software is developed to simulate the run condition of machine tools. The repeatable experiment results proves that the method is feasible and its precision is higher than DBB`s.

Introduction of a nozzle throat diameter dependency into the SRM dust size distribution

2006 ◽  
Vol 38 (9) ◽  
pp. 2117-2121 ◽  
Author(s):  
S. Stabroth ◽  
P. Wegener ◽  
M. Oswald ◽  
C. Wiedemann ◽  
H. Klinkrad ◽  
...  
Keyword(s):  
Size Distribution ◽  
Nozzle Throat ◽  
Dust Size Distribution ◽  
Throat Diameter

Choking Phenomena in a Vortex Flow Passing a Laval Tube: An Analytical Treatment

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Theo Van Holten ◽  
Monique Heiligers ◽  
Annemie Jaeken
Keyword(s):  
Numerical Simulation ◽  
Vortex Flow ◽  
Laval Nozzle ◽  
Analytical Theory ◽  
Axial Component ◽  
Nozzle Throat ◽  
Analytical Treatment ◽  
Test Channel ◽  
Flow Through ◽  
Total Velocity

The behavior of a vortex flow through a Laval nozzle was studied in connection with the purification of natural gas. By creating a vortex and passing it through a Laval nozzle, the gas will be cooled, and water droplets will form and will be centrifuged out of the gas. This system is named the Condi-Cyclone. An analytical theory is developed to reveal the most important phenomena of the flow, to first order accuracy. Experiments have been performed with a prototype of the Condi-Cyclone. A Euler numerical simulation was performed, using the geometry of the test channel. This paper presents an analytical theory for a vortex flow through a Laval nozzle. It will demonstrate that when a vortex is present the total velocity reaches sonic conditions upstream of the nozzle throat, that the axial component of the velocity in the nozzle throat is equal to the local speed of sound and that the mass flow through the Laval nozzle decreases with increasing vortex strength. The predictions of the analytical theory have been compared with the results of the experiments and the Euler numerical simulation, and it can be concluded that the analytical theory describes the main characteristics of the flow very well.

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