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Matthew J. Traum

Matthew J. Traum
Engineer Inc.

Ph.D.

About

70
Publications
13,640
Reads
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364
Citations
Additional affiliations
August 2011 - July 2014
Milwaukee School of Engineering
Position
  • Professor (Assistant)
August 2011 - July 2014
Milwaukee School of Engineering
Position
  • Professor (Assistant)
June 2007 - August 2011
University of North Texas at Dallas
Position
  • Professor (Assistant)

Publications

Publications (70)
Article
Full-text available
Carbon dioxide (CO2) capture is a crucial approach to reducing greenhouse gases in the atmosphere to directly combat climate change. Major components of the technology to desublimate CO2 at cryogenic temperatures are mature and have the potential to be applied to build large Artic/Antarctic direct-air CO2 capture plants. The discussion of precompre...
Conference Paper
View Video Presentation: https://doi.org/10.2514/6.2022-1493.vid Design, fabrication, and testing of a Tesla turbine is presented for inclusion in an undergraduate aerospace engineering thermodynamics laboratory kit for courses taught online to remote learners. Needed turbine torque and speed specifications were taken from a prony brake / photogate...
Conference Paper
The COVID-19 pandemic illuminated the critical need for flexible mechanical engineering laboratories simultaneously deployable in multiple modalities: face-to-face, hybrid, and remote. A key element in the lesson portfolio of a forward-looking engineering instructor is economical, hands-on, accessible, “turn-key” lab activities; kits that can be de...
Preprint
Full-text available
The COVID-19 pandemic illuminated the critical need for flexible mechanical engineering laboratories simultaneously deployable in multiple modalities: face-to-face, hybrid, and remote. A key element in the lesson portfolio of a forward-looking engineering instructor is economical, hands-on, accessible, 'turn-key' lab activities; kits that can be de...
Article
Full-text available
This paper composes a systematic design methodology to obtain optimal parameters of the Tesla turbine which is applicable in water distribution systems faced with the need to supply power for wireless sensors and other components used in smart water networks and the challenges associated with the feasibility of Tesla turbine in a small scale. The o...
Article
Full-text available
A thermodynamic model, borrowing ideas from psychrometric principles, of a cryogenic direct-air CO2-capture system utilizing a precooler is used to estimate the optimal CO2 removal fraction to minimize energy input per tonne of CO2. Energy costs to operate the system scale almost linearly with the temperature drop between the ingested air and the c...
Conference Paper
Full-text available
A new closed-loop educational paradigm is introduced that bespeaks high student engagement through a practically-focused engineering curriculum using as its principle teaching tool a "system of systems" familiar to students. The approach is called TOP-DOWN-TOP (TDT). In each TDT class, students are first presented with a familiar paradigmatic syste...
Article
Full-text available
Toward the goal of a fully online mechanical engineering bachelor degree program with curriculum-integrated hands-on laboratory experiments, a miniaturized circular hydraulic jump teaching lab kit was created and tested. This small and inexpensive kit is intended for shipment to remote learners who then assemble the experiment, collect data, perfor...
Article
Full-text available
Tesla turbines produce power at high rotation rate and low torque relative to other prime movers. At a tiny scale, this attribute renders Tesla turbines poorly matched to dynamometers designed to characterize electricand gasoline-powered radio-controlled vehicles and kit cars. Techniques are needed to enable Tesla turbine design and performance eva...
Conference Paper
Design processes and analytical modeling are presented showing creation of a low-cost concentrating photovoltaic-thermoelectric (PV/TE) hybrid power system for research and laboratory teaching built using a small upcycled satellite dish. Today, concentrated solar hybrid PV/TE systems are drawing significant research attention and funding investment...
Article
The analytical model of Carey is extended and clarified for modeling Tesla turbine performance. The extended model retains differentiability, making it useful for rapid evaluation of engineering design decisions. Several clarifications are provided including a quantitative limitation on the model's Reynolds number range; a derivation for output sha...
Conference Paper
There has been a recent surge in interest for Tesla turbines used in renewable energy applications such as power extraction from low-quality steam generated from geothermal or concentrated solar sources as well as unfiltered particle-laden biomass combustion products. High interest in these bladeless turbines motives renewed theoretical and experim...
Article
Full-text available
Introduction On Earth, potential solutions for our sustainable, enduring, high-density power needs are plentiful. However, in space no practical solutions currently exist to support long-term manned interplanetary missions. These missions require power sources possessing three critical attributes: high power density, longevity, and continuous opera...
Article
Full-text available
To provide students a more coherent and cohesive view of the mechanical engineering curriculum, we created and are delivering a multicourse curriculum-integrated engineering project that permeates and unifies five required classes within our undergraduate curriculum: 1) Freshman Design, 2) Dynamics, 3) Numerical Analysis, 4) Fluid Mechanics, and 5)...
Article
Full-text available
The comprehensive mechanical design for a feasible cold end unit capable of executing the expander portion of one-stage of a multistage Collins cycle is presented. This device is a working demonstration prototype for a three-stage cryocooler that will be capable of lifting one Watt at 10 Kelvin. Emphasis is placed upon the development of the cryoge...
Article
The engineering education literature lacks long- Term studies on persistence and retention impacts realized by teaching first-year engineering students about possible post-graduate career options via exposure to practicing engineers. At the University of North Texas (UNT), incoming mechanical and energy engineering (MEE) students (both freshman and...
Conference Paper
Full-text available
To integrate energy topics into STEM curricula, an archive of "Energy Engineering Laboratory Modules" (EELMs) is being developed by collaborating faculty and students at the Milwaukee School of Engineering (MSOE). EELMs facilitate spiral insertion of energy engineering experiments into college and high school STEM courses. By making innovative use...
Conference Paper
Full-text available
Rankine cycles will someday be the power plants of choice for manned space missions, providing excellent thermodynamic efficiency and high power density. The Rankine cycle's hallmark is a working fluid that changes phase between liquid and vapor. However, the working fluid must remain in the vapor phase as it passes through the turbine to avoid dam...
Conference Paper
Full-text available
Rankine cycles will someday be the power plants of choice for manned space missions, providing excellent thermodynamic efficiency and high power density. The Rankine cycle's hallmark is a working fluid that changes phase between liquid and vapor. However, the working fluid must remain in the vapor phase as it passes through the turbine to avoid dam...
Conference Paper
Full-text available
To provide students a more coherent and cohesive view of the mechanical engineering curriculum, we created and are delivering a multicourse curriculum-integrated engineering project that permeates and unifies five required classes within our undergraduate curriculum: 1) Freshman Design, 2) Dynamics, 3) Numerical Analysis, 4) Fluid Mechanics, and 5)...
Conference Paper
Full-text available
In space no practical solutions currently exist to support long-term manned interplanetary missions. These missions require power sources possessing three critical attributes: 1) high power density, 2) longevity, and 3) continuous operation independent of direct sunlight. Realizing that some conventional existing space power technologies have two,...
Article
To facilitate experimental introduction of biomass-to-energy technologies in an upper-division undergraduate thermodynamics course, a small, inexpensive wood chip gasifier was designed, constructed, and tested. This device was built from a metal vacuum-flask-style thermos bottle, and it was constructed for less than $50. The design is both simple a...
Article
Full-text available
Heat Collection Elements (HCE's) mounted in the focal line of parabolic troughs are a common solution for sunlight energy capture in concentrated solar power (CSP) systems. The typical HCE is a composite device consisting of a steel pipe mounted inside an evacuated glass tube. The inner pipe is covered with a high-absorptivity coating that encourag...
Article
Servant-Leadership is a leadership paradigm that emphasizes power sharing in decision making processes. It also encourages leaders to serve those they manage by propelling them toward high achievement while promoting their professional growth and self-efficacy. Servant-Leadership is also being pioneered as a teaching pedagogy at the Milwaukee Schoo...
Article
Full-text available
Conventional undergraduate mechanical engineering curricula are split into topical tracks where, from the students' perspective, each track has limited interconnectivity or overlap with the others. To provide students a more coherent and cohesive view, we created and are delivering a multicourse curriculum-integrated engineering project that permea...
Article
Full-text available
Textiles maintain wearer comfort by allowing evaporated sweat to permeate through, providing thermal management and keeping skin dry. For single layers, resistance to mass transport is relatively straightforward. However, when textiles are layered, water vapor transport becomes more complex because diffusing molecules must traverse interstitial spa...
Article
Full-text available
To introduce bio- and micro-technologies into general undergraduate thermal-fluids classes, a hands-on interdisciplinary in-class demonstration is described that juxtaposes classical pressure loss pipe flow experiments against a modern micro-characterization technique, AFM profilometry. Both approaches measure surface roughness and can segue into c...
Article
Pneumatic energy is converted into solid particle kinetic energy as a solid-particle-entrained gas flows downward through a vertical nozzle. For the conditions studied, the solid particles serve as a heat exchange medium to enable a gas expansion that is nearly isothermal. Also, the kinetic energy associated with the two-phase fluid is predominantl...
Conference Paper
Initial research is reported regarding the expansion and energy conversion of a gassolid two-phase flow. The multiphase fluid is expanded under conditions in which the energy of compressed gas is converted into kinetic energy of solid particles. Sufficient heat exchange between the gas and solid phases occurs for the gas phase expansion to proceed...
Article
Full-text available
Purpose - High autogyro accident rates prompted experimental investigation of this type of aircraft's low-speed pitch characteristics. Pitch control is typically derived from main rotor tip-path-plane adjustment. Thus, autogyro designers often omit horizontal tails and pitch control surfaces. The purpose of this paper is to enable autogyro low-spee...
Article
Full-text available
Effective pore diffusivities for dilute water vapor in air were measured at atmospheric pressure and 30°C by continuously weighing an evaporator capped with a porous polycarbonate barrier and correcting steady-state water vapor fluxes for apparatus mass transfer resistances. The Knudsen number was increased from 0.018 to 2.4 at constant pressure by...
Article
Experimental and theoretical research is reported on the expansion of a two-phase fluid consisting of a mixture of compressed gas and solid particles. Experimental temperature measurements indicate that the expansion is describable as isothermal for the conditions studied. During the expansion, the energy of the compressed gas is converted into kin...
Conference Paper
Full-text available
Although an extensively studied classical subject, laminar natural convection heat transfer from the vertical surface of a cylinder has generated some recent interest in the literature. In this investigation, numerical experiments are performed to determine average Nusselt numbers for isothermal vertical cylinders (10(2) < Ra-L < 10(9), 0.1 < L/D <...
Conference Paper
Full-text available
Space-based Rankine cycles will someday provide high-power density and excellent thermodynamic efficiency for future space missions. However, realization of high-temperature microgravity Rankine cycles is years away. Capitalizing on existing techniques for handling low-temperature fluids in space, we propose that a cryogenic Rankine cycle capable o...
Article
The engineering education literature calls for studies highlighting the impact of students' early exposure to post-graduate engineering careers. This paper provides data critical to assessing the effectiveness of a unique first-year experience concept: exposing new students to the careers of practicing engineers. We report on an initiative for inco...
Article
Full-text available
Microscale truss architectures provide high mechanical strength, light weight, and open porosity in polymer sheets. Liquid evaporation and transport of the resulting vapor through truss voids cool nearby surfaces. Thus, microtruss materials can simultaneously prevent mechanical and thermal damage. Assessment of promise requires quantitative underst...
Article
Full-text available
Micro- and nano-scale truss architectures provide mechanical strength, light weight, and breatheability in polymer barriers. Liquid evaporation and transport of resulting vapor through truss voids (pores) cools surfaces covered by the barriers, suggesting the possibility for simultaneous protection of humans from mechanical and thermal stresses. De...
Article
Full-text available
Meeting the need for trained researchers in the new Mechanical and Energy Engineering (MEE) Department at the University of North Texas (UNT), faculty and undergraduates are working together to develop a "researcher incubator" based on Just-In-Time learning pedagogies. The incubator's missions are to 1) train engineering undergraduates to perform r...
Thesis
Full-text available
Micro- and nano-scale truss architectures provide mechanical strength, light weight, and breatheability in polymer barriers. Liquid evaporation and transport of resulting vapor through truss voids (pores) cools surfaces covered by the barriers, suggesting the possibility for simultaneous protection of humans from mechanical and thermal stresses. De...
Presentation
Full-text available
Micro- and nano-scale truss architectures provide mechanical strength, light weight, and breatheability in polymer barriers. Liquid evaporation and transport of resulting vapor through truss voids (pores) cools surfaces covered by the barriers, suggesting the possibility for simultaneous protection of humans from mechanical and thermal stresses. De...
Article
A shock-tube facility consisting of two, single-pulse shock tubes for the study of fundamental processes related to gas-phase chemical kinetics and the formation and reaction of solid and liquid aerosols at elevated temperatures is described. Recent upgrades and additions include a new high-vacuum system, a new gas-handling system, a new control sy...
Conference Paper
Full-text available
A high accident rate among autogyros has prompted investigation of this aircraft type to increase understanding of its low-speed flight characteristics and safety limitations. Autogyros are often built without horizontal tail surfaces or elevators, as pitch control is derived by adjusting the angle of the main rotor tip-path-plane. However at very...
Article
Full-text available
Electromagnetic valves with smart control capability have been developed and demonstrated for use in the cold end of a Collins‐style cryocooler. The toroidal geometry of the valves was developed utilizing a finite‐element code and optimized for maximum opening force with minimum input current. Electromagnetic smart valves carry two primary benefits...
Article
Full-text available
Future spacecraft cooling and sensing systems will require advanced multi-stage cryocoolers capable of providing continuous cooling at multiple temperature levels ranging from 10 K to 95 K. Stirling and pulse-tube cryocoolers have achieved compactness and reliability by adopting mechanically simple cold head configurations at the expense of thermod...
Thesis
Full-text available
The comprehensive mechanical design for a feasible cold end unit capable of executing the expander portion of one-stage of a multistage Collins cycle is presented. This device is a working demonstration prototype for a three-stage cryocooler that will be capable of lifting one Watt at 10 Kelvin. Emphasis is placed upon the development of the cryoge...
Conference Paper
The feasibility of a compact, reliable, low-cost, and efficient cryocooler capable of delivering 1 Watt of cooling at 10K using less than 1kW of input power has been demonstrated analytically. The technology promises to provide highly efficient refrigeration for temperatures as low as 4K, and to be particularly beneficial for temperatures below 30K...
Chapter
Full-text available
The feasibility of a compact, reliable, low-cost, and efficient cryocooler capable of delivering 2W of cooling at 10 K using less than 1 kW of input power has been demonstrated analytically. The technical approach is to apply a high-efficiency thermodynamic cycle to a compact and reliable small-scale system by implementing a modern microprocessor i...
Conference Paper
Full-text available
A cryogenic expander employing low-temperature helium is under development. This expander employs a floating piston operating between a warm variable volume and a cold variable volume to expand the working fluid. The piston’s position is dynamically regulated through an active control routine that actuates electromechanical valves. These valves con...
Article
Two shock tubes at The Aerospace Corporation have been refurbished for the study of fundamental processes related to the formation and reaction of solid and liquid aerosols at elevated temperatures. One shock tube is intended for the study of powdered aerosols and other condensed-phase species, while the second tube is designed for die study of gas...
Technical Report
A study of the characteristics and behavior of submicron glass powders is pertinent to Aerospace research on two-phase combustion chemistry in the shock tube, particularly as it relates to the combustion synthesis of materials. A brief literature review of previous work covering aerosol dispersion, particle handling, and previously attempted shock-...
Thesis
Full-text available
This report details experimental work and analysis conducted as an undergraduate research project for the University of Bristol concerning the low speed pitch sensitivity of the autogyro. A high accident rate recently among autogyros has prompted a desire for this type of aircraft to be further investigated, as very little research has been carried...

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