Response Surface Method Optimization of Uniform and Axially Segmented Duct Acoustics Liners

2006 ◽  
Vol 43 (4) ◽  
pp. 1089-1102 ◽  
Author(s):  
L. Lafronza ◽  
A. McAlpine ◽  
A. J. Keane ◽  
R. J. Astley
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Duct Acoustics ◽  
Surface Method ◽  
Method Optimization

scholarly journals Response Surface Method in Evaluating the Extrusion Effects on Molecular Degradation and Physical Properties of Sago Starch

2020 ◽  
pp. 1-10
Author(s):  
Ansharullah Ansharullah ◽  
Sri Wahyuni ◽  
. Tamrin ◽  
Muhammad Natsir
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Water Solubility ◽  
Mechanical Energy ◽  
Sugar Content ◽  
Water Soluble ◽  
Process Conditions ◽  
Sago Starch ◽  
Melt Temperature ◽  
Surface Method

This study was aimed to measure the effect of extrusion on the molecular degradation and physical characteristics of the sago starch by employing response surface method. The starch was extruded in a twin screw extruder with moisture contents of 25, 32.5, and 40%; melt temperature of 86, 95 and 104oC; and screw speed of 100, 150, and 200 rpm. The extruded products were then analyzed for degree of molecular degradation, reducing sugars of the water soluble materials, water solubility index (WSI), water absorption index (WAI), enzyme susceptibility, gelatinization endothermic energy (∆H), and specific mechanical energy (SME). Increased mechanical and thermal energy input received by the products in the extruder gave rise to a significant degradation of the molecular weight of the macromolecules. It was believed that granule structures of the extruded starch have been reshaped. The extrusion process conditions did not significantly affect the WSI, WAI, reducing sugar content, and ∆H. All extruded samples had a much lower gelatinization endothermic energy than native starch.

Optimization and Simulation of a CFR Engine Fueled by Dilute Anode Tail-Gas

2020 ◽  
Author(s):  
Alexander Balu ◽  
Miguel Castro ◽  
Geet Padhi ◽  
Todd Bandhauer ◽  
Bret Windom ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Response Surface ◽  
Response Surface Method ◽  
Operating Conditions ◽  
Computational Time ◽  
Boost Pressure ◽  
Engine Operation ◽  
Dewpoint Temperature ◽  
Surface Method ◽  
Method Optimization

Abstract Recent innovations in Metal Supported Solid Oxide Fuel Cells (MS-SOFC) have increased the longevity and reliability of fuel cells. These innovations drive the desire to create power generating systems that combine different ways of extracting power from a fuel to increase overall thermal efficiency. This investigation assesses the feasibility of operating an internal combustion engine with the anode tail-gas, which is a blend of H2, CO, CO2, H2O, and CH4, exhausted by a MS-SOFC. This engine would be used to support fuel cell balance of plant equipment and produce excess electrical power. Four variations of the expected anode tail-gas blends were determined by varying the dewpoint temperature of the fuel. Gas blends are tested by combining separate flows of each constituent, and combustion is tested using a Cooperative Fuel Research (CFR) engine. Compression ratio, spark timing, inlet manifold temperature, and boost pressure were used to obtain optimal operating conditions. Stable engine operation was obtained on all test blends. A combination of computational fluid dynamics (CFD) and analysis of chemical species and reaction mechanisms is used to develop an engine and combustion model. This model allows for further investigation into anode tail-gas combustion characteristics. Response Surface Method Optimization was used to experimentally optimize operating parameters and determine the maximum achievable efficiency utilizing the CFR engine. All test blends with H2O produced power in the engine although the blend with the most water content caused operational problems with the CFR engine test stand, including large amounts of water entering the oil system. Three chemical kinetic mechanisms were investigated that had the correct species for simulating the fuel with a low number of reactions to facilitate low computational time: San Diego (SD), GRI and Gallway 2017 (NUIG) mechanism. Out of these four mechanisms, the NUIG mechanism results fit the CFR engine experimental data best. Response Surface Method Optimization was performed on the most viable test blends, the steam injections blends at 40°C and 90°C fuel dewpoint temperature. During optimization the 40°C dewpoint temperature blend brake efficiency increased from 20% to 21.6%, and the 90°C dewpoint temperature blend brake efficiency increased from 17% to 22.3%.

Response surface method optimization of a novel Hypericin formulation in P123 micelles for colorectal cancer and antimicrobial photodynamic therapy

2017 ◽  
Vol 170 ◽  
pp. 247-255 ◽  
Author(s):  
Maiara Camotti Montanha ◽  
Larissa Lachi Silva ◽  
Fernanda Belincanta Borghi Pangoni ◽  
Gabriel Batista Cesar ◽  
Renato Sonchini Gonçalves ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Photodynamic Therapy ◽  
Response Surface ◽  
Response Surface Method ◽  
Antimicrobial Photodynamic Therapy ◽  
Surface Method ◽  
Method Optimization

A Coupled Blade Adjustment and Response Surface Method for the Optimization of Radial Fans Without Housing

2014 ◽  
Author(s):  
H. Ratter ◽  
Ş. Çağlar ◽  
M. Gabi
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Computational Cost ◽  
Pressure Rise ◽  
Leading Edge ◽  
Optimization Process ◽  
Surface Method ◽  
Flow Phenomena ◽  
Meridional Shape ◽  
Classical Knowledge

The optimization process of a fan based on 3D viscous CFD calculations is time consuming, especially if many variables are taken into account. With the focus on computational cost efficiency and reliable CFD-results a specific optimization algorithm for radial fans based on CFD calculations is presented. The algorithm is derived from the classical knowledge of flow phenomena occurring in radial fans. The leading edge is adjusted in reference to the stagnation point caused by the incoming flow. The trailing edge is adjusted to achieve the required pressure rise. The 5 blades of the investigated fan are constructed as 3D free surface blades; each blade is separated into 5 profile sections. The optimization process regarding the blade includes 10 independent parameters of the leading and trailing edges. An additional potential to increase efficiency is obtained by changing the meridional shape of the impeller. To investigate the meridional shape, the blade adjustment algorithm is coupled with a response surface method using the Kriging approximation to find a highly efficient meridional shape.

A Proposal of PSO with Presumption Function of the Solution Landscape by Response Surface Method

2014 ◽  
Vol 134 (9) ◽  
pp. 1293-1298
Author(s):  
Toshiya Kaihara ◽  
Nobutada Fuji ◽  
Tomomi Nonaka ◽  
Yuma Tomoi
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Surface Method
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