Unpredictable Dynamics of Polymeric Reacting Flow by Comparison between Pre- and Post-Reaction Fluid Properties: Hydrodynamics Involving Molecular Diagnosis via ATR–FTIR Spectroscopy

2019 ◽  
Vol 123 (21) ◽  
pp. 4587-4593
Author(s):  
Toshimasa Ueki ◽  
Jun Iijima ◽  
Satoshi Tagawa ◽  
Yuichiro Nagatsu
Keyword(s):  
Ftir Spectroscopy ◽  
Molecular Diagnosis ◽  
Reacting Flow ◽  
Fluid Properties ◽  
Reaction Fluid

Numerical Investigation of a N2O/HTPB Hybrid Rocket Motor with a Dual-Vortical-Flow (DVF) Design

2017 ◽  
Vol 33 (6) ◽  
pp. 853-862 ◽  
Author(s):  
A. Lai ◽  
Y. C. Lin ◽  
S. S. Wei ◽  
T. H. Chou ◽  
J. W. Lin ◽  
...  
Keyword(s):  
Specific Impulse ◽  
Rocket Motor ◽  
Vortical Flow ◽  
Reacting Flow ◽  
Hybrid Rocket ◽  
Rocket Motors ◽  
Roll Control ◽  
Hybrid Rocket Motor ◽  
Fluid Properties ◽  
Rocket Performance

AbstractA compact hybrid rocket motor design that incorporates a dual-vortical-flow (DVF) concept is proposed. The oxidizer (nitrous oxide, N2O) is injected circumferentially into various sections of the rocket motor, which are sectored by several solid fuel “rings” (made of hydroxyl-terminated polybutadiene, HTPB) that are installed along the central axis of the motor. The proposed configuration not only increases the residence time of the oxidizer flow, it also implies an inherent “roll control” capability of the motor. Based on a DVF motor geometry with a designed thrust level of 11.6 kN, the characteristics of the turbulent reacting flow within the motor and its rocket performance were analyzed with a comprehensive numerical model that implements both real-fluid properties and finite-rate chemistry. Data indicate that the vacuum specific impulse (Isp) of the DVF motor could reach 278 s. The result from a preliminary ground test of a lab-scale DVF hybrid rocket motor (with a designed thrust level of 3,000 N) also shows promising performance. The proposed DVF concept is expected to partly resolve the issue of scalability, which remains challenging for hybrid rocket motors development.

Modelling of Variables Gas Properties and Compositions in Turbomachinery Flow Simulations

2008 ◽  
Author(s):  
Luca Di Mare
Keyword(s):  
Reacting Flow ◽  
Turbine Stage ◽  
Splitting Algorithm ◽  
Turbine Engine ◽  
Flow Equations ◽  
Flow Simulations ◽  
Specific Heats ◽  
Fluid Properties ◽  
Engine Components ◽  
Flux Difference

This paper describes the formulation of computational methods for aerothermodynamic predictions in turbomachinery passages and gas-turbine engine components accounting for changes in fluid properties. The changes accounted for include the change of specific heats with temperature and changes in composition as consequence of the injection of chemical compounds different from those forming the main gas stream, and the reactions between the main gas stream and these compounds. The flow equations for compressible flow with variable properties and compositions are stated, with particular reference to the inviscid flux jacobians and their eigenvalues and eigenvectors. These are used to derive a Roe-like flux difference splitting algorithm. The algorithm derived is applied to the computation of variable property, reacting flow in a transonic nozzle and to the computation of equilibrium flow in a High-Pressure turbine stage.

1504: Molecular Diagnosis and Staging of Prostate Cancer Using Clusterin in Real Time Reverse Transcription Polymerase Chain Reaction (RT-PCR)

2006 ◽  
Vol 175 (4S) ◽  
pp. 485-486
Author(s):  
Sabarinath B. Nair ◽  
Christodoulos Pipinikas ◽  
Roger Kirby ◽  
Nick Carter ◽  
Christiane Fenske
Keyword(s):  
Prostate Cancer ◽  
Polymerase Chain Reaction ◽  
Real Time ◽  
Molecular Diagnosis ◽  
Reverse Transcription ◽  
Rt Pcr ◽  
Chain Reaction ◽  
Polymerase Chain

High resolution FTIR spectroscopy using a slit jet: sampling the overtone spectrum of 12C2H4

1997 ◽  
Vol 90 (3) ◽  
pp. 381-387 ◽  
Author(s):  
R. GEORGES ◽  
M. BACH ◽  
M. HERMAN
Keyword(s):  
High Resolution ◽  
Ftir Spectroscopy
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