A multistage mesh generator for solving the average-passage equation system

One means of numerically simulating the 3-D flow field within a multistage turbomachine is through the solution of the average-passage equation system. One requirement of a current algorithm used to solve this system of equations has been the ability to generate multiple blade row meshes which satisfy specific geometrical constraints. In addition to meeting this criterion, one desires a mesh generation code which requires minimal user input, utilizes variable mesh control parameters, generates diagnostics helpful to the user, and possesses the capability to handle widely varying geometries. A mesh generation code with these features was written and has been used in solving the inviscid form of the average-passing equation system for both ducted and unducted multiple blade row geometries. This paper serves as a user reference guide, with a description of the mesh generation algorithm, a sample input file, and examples of typical meshes generated

Reduction by monovalent zinc, cadmium, and nickel cations

Understanding of chemical properties of monovalent transition metal cations in aqueous solutions was obtained by a study of kinetics of reduction of different inorganic substrates by zinc, cadmium, and nickel

Botanical Folktales

This written document is the accompanying thesis for my Master of Fine Arts Exhibition, Botanical Folktales, shown in the Laura Mesaros Gallery at West Virginia University (displayed March 20-23, 2023). It documents the research, motivations, and processes presented in the artwork displayed throughout the gallery. Through prints and artist’s books this body of work represents my pursuit to connect, understand and share gratitude for native plants of Appalachia. Plants are my muse to reconnect and learn about the living environment. Not only do plants hold stories and signify different meanings in every culture, but also nourish our bodies and bring people together. This work strives to elevate the importance of specific native species by presenting different avenues for understanding. Nostalgic and sweet, I chose to focus on native wildflowers because of their aesthetic beauty, role in human culture, and the stories they carry. In the end, the work in this exhibition is intended to celebrate native plant species of Appalachia and educate about their stories

A model for closing the inviscid form of the average-passage equation system

A mathematical model is proposed for closing or mathematically completing the system of equations which describes the time average flow field through the blade passages of multistage turbomachinery. These equations referred to as the average passage equation system govern a conceptual model which has proven useful in turbomachinery aerodynamic design and analysis. The closure model is developed so as to insure a consistency between these equations and the axisymmetric through flow equations. The closure model was incorporated into a computer code for use in simulating the flow field about a high speed counter rotating propeller and a high speed fan stage. Results from these simulations are presented

A numerical simulation of the inviscid flow through a counter-rotating propeller

The results of a numerical simulation of the time-averaged inviscid flow field through the blade rows of a multiblade row turboprop configuration are presented. The governing equations are outlined along with a discussion of the solution procedure and coding strategy. Numerical results obtained from a simulation of the flow field through a modern high-speed turboprop will be shown

Average-passage simulation of counter-rotating propfan propulsion systems as applied to cruise missiles

Counter-rotating propfan (CRP) propulsion technologies are currently being evaluated as cruise missile propulsion systems. The aerodynamic integration concerns associated with this application are being addressed through the computational modeling of the missile body-propfan flowfield interactions. The work described in this paper consists of a detailed analysis of the aerodynamic interactions between the control surfaces and the propfan blades through the solution of the average-passage equation system. Two baseline configurations were studied, the control fins mounted forward of the counter-rotating propeller and the control fins mounted aft of the counter-rotating propeller. In both cases, control fin-propfan separation distance and control fin deflection angle were varied

Solvolysis Reactions of tert-Butyl Chloride and Methyl Tosylate in Trimethoxyborane Methanol Mixtures

The solvolysis rates of t-butyl chloride and methyl tosyla.te were measured in various trimethoxyborane - methanol mixtures. The ionizing power and the nucleophilicity for the respective solvent mJxtures were determirrled, and the suitability of this new solvent system for the study of solvolytic reactions is discussed. At elevated temperatures a reaction of hydrogen chloride, liberated in the solvolysis of t~butyl chloride, with the solvent was observed, and the r esults seem to indicate that methyl chloride is the reaction product

Solvolysis Reactions of tert-Butyl Chloride and Methyl Tosylate in Trimethoxyborane Methanol Mixtures

The solvolysis rates of t-butyl chloride and methyl tosyla.te were measured in various trimethoxyborane - methanol mixtures. The ionizing power and the nucleophilicity for the respective solvent mJxtures were determirrled, and the suitability of this new solvent system for the study of solvolytic reactions is discussed. At elevated temperatures a reaction of hydrogen chloride, liberated in the solvolysis of t~butyl chloride, with the solvent was observed, and the r esults seem to indicate that methyl chloride is the reaction product

Assessment of Stage 35 With APNASA

An assessment of APNASA was conducted at NASA Glenn Research Center under the Fundamental Aeronautics Program to determine their predictive capabilities. The geometry selected for this study was Stage 35 which is a single stage transonic compressor. A speedline at 100% speed was generated and compared to experimental data at 100% speed for two turbulence models. Performance of the stage at 100% speed and profiles of several key aerodynamic parameters are compared to the survey data downstream of the stator in this report. In addition, hub leakage was modeled and compared to solutions without leakage and the available experimental data

Utilization of parallel processing in solving the inviscid form of the average-passage equation system for multistage turbomachinery

A procedure is outlined which utilizes parallel processing to solve the inviscid form of the average-passage equation system for multistage turbomachinery along with a description of its implementation in a FORTRAN computer code, MSTAGE. A scheme to reduce the central memory requirements of the program is also detailed. Both the multitasking and I/O routines referred to are specific to the Cray X-MP line of computers and its associated SSD (Solid-State Disk). Results are presented for a simulation of a two-stage rocket engine fuel pump turbine