Numerical investigation of aerospike semi-cone angle and a small bump on the spike stem in reducing the aerodynamic drag and heating of spiked blunt-body: New correlations for drag and surface temperature

2021 ◽  
Vol 33 (11) ◽  
pp. 116108
Author(s):  
Veeresh Tekure ◽  
Pratik Shrikant Pophali ◽  
K. Venkatasubbaiah
Keyword(s):  
Surface Temperature ◽  
Numerical Investigation ◽  
Blunt Body ◽  
Aerodynamic Drag ◽  
Cone Angle ◽  
Small Bump

Numerical Investigation of the Effect of Capsule Half-Cone Angle on a Supersonic Parachute System

2016 ◽  
Vol 29 (4) ◽  
pp. 06016001 ◽  
Author(s):  
Xiao-Peng Xue ◽  
Yusuke Nishiyama ◽  
Yoshiaki Nakamura ◽  
Koichi Mori ◽  
Chih-Yung Wen
Keyword(s):  
Numerical Investigation ◽  
Cone Angle ◽  
Parachute System ◽  
Half Cone ◽  
Half Cone Angle

Numerical Study on Layout of Refractory Belt and Fouling Deposition in Tangentially Fired Boiler

2016 ◽  
Author(s):  
Qiongliang Zha ◽  
Kai Chen ◽  
Jianwen Zhang ◽  
Jiangtao Li ◽  
Chang’an Wang ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Numerical Investigation ◽  
Numerical Study ◽  
High Surface ◽  
Three Dimensional ◽  
Furnace Wall ◽  
Combustion Stability ◽  
Particle Capture ◽  
Dimensional Simulation ◽  
Ignition And Combustion

The refractory belt installed in primary combustion zone provides simplest and most effective solution to suppress ignition delay and enhance combustion stability for low volatile anthracite and lean coal. The fouling deposition generally formed on radiative refractory lined wall of the boiler due to a high surface temperature. The growth of deposition thickness is mainly dependent on the parcile impact on the surface of water wall. A particle capture submodel was used to determine whether a particle was captured to form deposition or not when it reached the furnace wall, and the particle capture criterion was based on the particle’s viscosity and the temperature of the furnace wall. A reduced fouling deposition model was implemented in a three dimensional simulation of a tangentially fired boiler. The numerical investigation was conducted to assess the performance of different layouts of refractory belt. Furnace temperature, surface temperature of refractory belt, and deposition distributions on the furnace wall should be taken into account when layouts of refractory belt are optimized. Based on this, three layouts of refractory belt were proposed for tangentially fired boilers. A numerical investigation was conducted to assess the performance of different layouts of refractory belt and the results showed that the temperature in furnace was increased, and the ignition and combustion processes were stabilized when refractory belts were installed. The reasonable arrangement of refractory belt could reduce the possibility of fouling deposition in furnace.

scholarly journals Experimental and numerical investigation of thermal flow meter

2015 ◽  
Vol 36 (3) ◽  
pp. 149-160 ◽  
Author(s):  
Artur Cebula
Keyword(s):  
Temperature Distribution ◽  
Numerical Model ◽  
Surface Temperature ◽  
Numerical Investigation ◽  
Flow Rate ◽  
Experimental Investigations ◽  
Thermal Flow ◽  
Wall Surface ◽  
Flow Meter ◽  
Calculation Results

Abstract The paper presents analytical and numerical model calculation results of the temperature distribution along the thermal flow meter. Results show a very good conformity between numerical and analytical model. Apart from the calculation results the experimental investigations are presented. The author performed the test where a temperature of duct wall surface was measured. The relation between mass flow rate in terms of the duct surface temperature difference was developed.

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