Edward Rademaker has over 30 years of experience in aeroacoustics and gas turbine research at NLR. He has extensive experience developing experimental measurement techniques and conducting acoustic testing. Some of his areas of expertise include fan and propeller noise, duct acoustics, liner measurements and design, and engine performance simulation. He has published many papers in these areas and participated in several European research projects. Currently he works on topics like hot-stream liner testing, gear fault detection using acoustics, and engine performance prediction.
BRONKITIS KRONIS
Disusun oleh :
Peti Indriani
C1AB15052
Pengertian
Radang mendadak pada bronkus yang biasanya mengenai trakea dan laring.
Sering juga disebut laringotrakeobronkitis.
Menunjukkan kelainan pada bronkus yang sifatnyamenahun (berlangsung lama).
Produksi mukus berlebihan, menimbulkan batuk dengan ekspektoransi sedikitnya 3 bulan dalam setahun dan paling sedikit 2 tahun secara berturut-turut
Etiologi
Ada 3 jenis penyebab bronkitis akut :
- infeksi, seperti staphylococcus, streptococus, pneumococcus, haemiphilus influenza
- alergi
- rangsangan seperti asap pabrik, kendaraan bermotor, rokok dan lain-lain
Climate Smart Landscapes: addressing trade-offs and delivering multiple benef...CIFOR-ICRAF
This presentation was delivered at the third Asia-Pacific Forestry Week 2016, in Clark Freeport Zone, Philippines.
The five sub-thematic streams at APFW 2016 included:
Pathways to prosperity: Future trade and markets
Tackling climate change: challenges and opportunities
Serving society: forestry and people
New institutions, new governance
Our green future: green investment and growing our natural assets
BRONKITIS KRONIS
Disusun oleh :
Peti Indriani
C1AB15052
Pengertian
Radang mendadak pada bronkus yang biasanya mengenai trakea dan laring.
Sering juga disebut laringotrakeobronkitis.
Menunjukkan kelainan pada bronkus yang sifatnyamenahun (berlangsung lama).
Produksi mukus berlebihan, menimbulkan batuk dengan ekspektoransi sedikitnya 3 bulan dalam setahun dan paling sedikit 2 tahun secara berturut-turut
Etiologi
Ada 3 jenis penyebab bronkitis akut :
- infeksi, seperti staphylococcus, streptococus, pneumococcus, haemiphilus influenza
- alergi
- rangsangan seperti asap pabrik, kendaraan bermotor, rokok dan lain-lain
Climate Smart Landscapes: addressing trade-offs and delivering multiple benef...CIFOR-ICRAF
This presentation was delivered at the third Asia-Pacific Forestry Week 2016, in Clark Freeport Zone, Philippines.
The five sub-thematic streams at APFW 2016 included:
Pathways to prosperity: Future trade and markets
Tackling climate change: challenges and opportunities
Serving society: forestry and people
New institutions, new governance
Our green future: green investment and growing our natural assets
Numerical Simulation Over Flat-Disk Aerospike at Mach 6Abhishek Jain
Above Research Paper can be downloaded from www.zeusnumerix.com
The research paper aims to study the effect of Aerospikes on hypersonic missiles in the reduction of drag and heat flux. Parametric study if the aerospike geometry has been carried out by varying the L/D ratio of the spike. The results have been compared with experimental data at Mach 6. Up to 73.6% decrease in drag is seen at zero angles of attack. The reduction becomes lesser at higher angles of attack. There is a significant increase in pitching moment at an angle of attack and this needs to be further studied. Authors - Vivek Warade (Zeus Numerix), Rahul Pawar and Prof NR Gilke (KJ Somaiya COE)
A Review on optimization of Dry Electro Discharge Machining Process Parametersijsrd.com
Dry EDM is an environmental friendly machining process were liquid dielectric is replaced by gaseous dielectrics. There are presented performance characteristics of the process, using various gases and their mixtures as dielectric medium. The main aim is to study the effect of gap voltage, discharge current, pulse-on time, duty factor, air pressure and spindle speed on Material removal Rate (MRR), Surface Roughness (Ra) and Tool Wear Rate (TWR). Influence of gas pressure, flow rate and rotational speed of the electrode are also discussed resulting in finding optimal conditions for machining, depending on the optimization criteria.
Stethoscopes are in use for more than 200 years for medical diagnostics, especially for auscultation in the healthcare domain. Recently, unprecedented growth in mobile technology has revived the use of stethoscopes for Telehealthcare. Digital or electronic stethoscopes are increasingly researched for use in Telehealthcare within the healthcare domain. Cardiovascular diseases have become highly prevalent worldwide, especially in the subcontinent. Improvements in diagnostics will improve the quality of life and prevent the loss of life. This research paper mainly focuses on the acoustical and multiphysics design aspects of the stethoscope for improved acoustical performance. A COMSOL model of the stethoscope chest piece was developed. The model was setup to investigate the effects of geometry, material of construction, noise and input pressure. The sound transmission efficiency of the components was investigated with multiphysics models by coupling the acoustical and structural performances. The effect of ambient noise on the performance was also studied and reported. This COMSOL model wasis further used to investigate the effects of shape, size and material parameters on the performance and improvement in the acoustic transmission and noise isolation. The frequency response of the system was also investigated for resonance and performance in relation to auscultation of cardio, lung and other sounds. Through this research paper the researchers share the initial findings for the development of acoustical and multiphysics design aspects of the stethoscope. The ultimate objective is to leverage the improvement in the acoustics of the stethoscope for use in Telehealthcare.
1. 1
Curriculum Vitae Edward Rademaker (NLR-AVGS)
Version: 2015.1 Date: 17-09-2015
Personal details
name : Edward Ronald Rademaker
date of birth : 27 May 1956
place of birth : Leiden
address (private) : Bergh 7
8302 KK Emmeloord
telephone number at home : 0527 - 614775
telephone number at NLR : 088 – 5114646
NLR e-mail adress : edward.rademaker@nlr.nl
Schooling
1968 – 1975 : High school
1975 – 1987 : Applied physics at the Technical University of Delft
Laboratory for Aero and Hydrodynamics, sub-group
Turbulence
1987 - 2004 : NLR Department of Aeroacoustics (AK)
2005 - 2013 : NLR Department of Gas Turbine & Structural Integrity
(AVGS)
Current position and experiences
NLR : R&D engineer Gas turbines (AVGS)
NLR experiences : Acoustic instrumentation, data acquisition and analysis,
development and use of several experimental measurement
techniques, fan and propeller noise, diffraction and
refraction, duct acoustics, liner measurements and liner
design, acoustic antenna, weapon bay acoustics, former
acoustics project leader of acoustic wind-tunnel tests in
KAT, FDF, DNW-LST, DNW-LLF, DNW-HST and DNW-
SST, development on engineering models (models for many
type of acoustic liners, phase theory for propeller acoustics,
simple fuselage refraction model, jet noise prediction model
for Dutch Green Aircraft (SAE-based method), atmospheric
propagation and refraction, Engine Performance simulation,
Gas Turbine Simulation Programme (GSP), Aero-engine
emissions, Heat transfer, Engine seals technology and
development of “aerodynamic engineering models”
Computer experience : FORTRAN, Delphi Pascal
2. 2
Contract research : Many projects on a variety of aero-acoustics and engine
performance (including emissions) subjects
European projects : FANPAC (FAn Noise Prediction And Control, 1993 - 1996);
a project on fan noise reduction
RANNTAC (Reduction of Aircraft Noise by Nacelle
Treatment and Active Control, 1998 - 2000); a project on
nacelle noise reduction technology
RESOUND (Reduction of Engine Source Noise through
Understanding and Novel Design, 1998 - 2000)
Co-ordinator DUCAT (Basic Research on Duct Acoustics
and Radiation, 1998 - 2000)
SILENCE® Engine tests Rolls-Royce (WP’s 1.1 and 2.2),
liner (WP 1.2) and hot stream liner research (WP 1.3)
VITAL (Modal measurements in Anecom Aerotest and
CIAM)
HISAC project (Engine performance simulation of mixer-
ejector turbofan engine)
ECATS, Clean Sky, TEAM_play, ESPOSA¸ HIKARI,
Clean Sky Evaluator on the subjects “Noise and engine
Emissions”
Publications in the NLR acoustic period (until 2004)
- Many NLR technical and contract reports
- Rademaker, E.R., Experimental validation of a lined-duct acoustics model including flow,
ASME-paper 90-WA/NCA-2
- Klijn, J.M., Rademaker, E.R., Instrumentation for in-flight acoustic measurements in an
engine inlet duct of a Fokker 100 aircraft, paper presented at the SFTE 22nd annual
symposium, August 5-9, 1991, St. Louis, Missouri, U.S.A.
- Sarin, S.L., Rademaker, E.R., Some results of in-flight measurements on modal content in
turbofan engine inlet of Fokker 100 aircraft, Proceedings of Noise-93 (St. Petersburg), Vol. 4,
editors. M.J. Crocker and N.I. Ivanov, pp 105 - 110
- Sarin, S.L., Rademaker, E.R., In-flight acoustic mode measurements in the turbofan engine
inlet of Fokker 100 aircraft, AIAA-paper 93-4414
- Rademaker, E.R., Experimental Investigation on the influence of liner non-uniformities on
prevailing modes, AIAA 96-1682
- Sijtsma, P., Rademaker, E.R., Schulten, J.B.H.M., Experimental validation of a lifting surface
theory for rotor-stator interaction noise generation, AIAA 96-1744 and AIAA-journal, Vol.
3. 3
36, No. 6, June 1998
- Rademaker, E.R., Sijtsma, P., Tester, B.J., Mode detection with an optimised array in a model
turbofan engine intake at varying shaft speeds, AIAA-paper 2001-2181
- Rademaker, E.R., Development and validation of numerical methods for duct acoustics within
DUCAT, Acoustique Techniques numero 27, Dossier “Salon du Bourget”, 4e
trimestre 2001
- Rademaker, E.R., Idzenga, S, Huisman, H., Nijboer, R. and Sarin, S., A new facility for hot
stream acoustic liner testing, Tenth International Congress on Sound and Vibration, 7 –10
July 2003, Stockholm, Sweden
- Nordin, P., Sarin, S.L. and Rademaker, E.R., Development of new liner technology for
application in hot stream areas of aero-engines, Abstract 10th
AIAA/CEAS conference, 10-12
May 2004, Manchester, AIAA 2004-3033
- Demmenie, E.A. and Rademaker, E.R., Development of and in-situ acoustic impedance
measurements on air-injected acoustic liners, Inter-noise 2004, August 22nd
– 25th
, Prague
Publications in the AVGS period (2005 - 2013)
- Rademaker, E.R., Hot-stream in-situ acoustic impedance measurements on various air-filled
cavity and porous liners, ICSV-16 2009 Krakow, Poland
- Rademaker, E.R., Performance simulation of an ideal mixer-ejector turbofan engine for a
supersonic business jet, ICAS conference 2010, Nice
- Engine performance prediction for varied LPT vane geometry utilizing test rig data and
combined CFD and cycle models, van Rooij, M., Kogenhop, O., Rademaker, E.R.,
Woodason, R. and Soemarwoto, B.I., ASME paper GT2012-69838
- Rademaker, E.R. and Hwang, J.S., Acoustics-based seeded rotary gear fault detection: part I:
The use of an internally mounted acoustic antenna array, ASHMC 2012
- Hwang, J.S. and Rademaker, E.R., Acoustics-based Seeded Rotary Gear Fault Detection: Part
II: Assessment of Condition Indicators and Cepstrum Analysis, ASHMC 2012
- Rademaker, E.R., Scaling of compressor and turbine maps on basis of equal flow Mach
numbers and static flow parameters, NLR-TP-2012-257, to be published
- Redistribution of HPT-shroud cooling channels including turbine blade tip effects,
Rademaker, E.R., Soemarwoto, B.I., Huls, R.A. and van Gestel, R., ASME 2013 Turbine
Blade Tip Symposium, abstract accepted TBTS-2013-2060
STW-user committee
I was a member of the STW-user committee on “Flow-induced pulsations in gas transport systems”
(STW project number ESF.5645).
4. 4
University related activities
Until 2012 I have given guest lectures on Aero-acoustics for the Mechanical (3ME) and Aerospace
Faculties of the Technical University of Delft (Prof. J. van Buijtenen). I still guide and have guided
students on various education levels.
List of followed courses
- Aero- and Hydro-Acoustics, Advanced programme for industry, University of Cambridge
(1990)
- NLR course on business communication (1991)
- NLR course on project management (1992)
- Computational fluid dynamics for engineers, AIAA homework course (1996)
- VKI course on Film cooling (2008)
Work contacts within Aerospace industry
Rolls-Royce, Rolls-Royce Deutschland, SNECMA, Turbomeca, ITP, MTU, Plansee, Pratt & Whitney
Canada, UTRC, GE, Shorts, INBIS, Airbus (UK, France and Germany), EADS CRC, Hispano Suiza,
Aermacchi, Northrop Grumman, Lockheed Martin, many smaller industrial companies (liner
manufacturers and others), Pratt & Whitney (labyrinth and brush seals)
Recent work contacts with (relatively small) Dutch Gas Turbine industry
Eldim, Elbar, Chromalloy, Standard Aero, MTT, Stork Turbo Blading, EECT and Aeronamic
Contacts within Aerospace community besides industry
Research establishments (TNO-TPD, DLR, ONERA, ….), Universities (Eindhoven, Twente, Delft,
ISVR, …..), Test facilities (DNW, Hucknall, Ansty, Anecom Aerotest, …..)
Some quotes of key industrial partners of joint research efforts
Dr. B. Tester (principal and key research scientist Rolls-Royce, early retirement and still active in the
field, current ISVR, Visiting professor of Imperial College London, joint fan noise related work
during a 1½ decennium):
“It has been a great privilege to work with you guys at NLR and lots of fun as well.”
N. Baker (Rolls-Royce engineering) about innovative research on exhaust liners in the hot stream
acoustic liner test facility (2003):
“Thanks for your report - It is a very thorough and extensive record – and should provide a very
useful basis for further understanding of the database”
Dr. Andreas Venskutonis and Dr. Jörg Färber (PLANSEE Aktiengesellschaft, Austria) about the
advice and test of the titanium liner and other liners:
“Let us take the opportunity to say thank you for all the work you did within the WP 1.3 and also let
us congratulate to the outstanding scientific work you arranged in the course of this SILENCE(R)
sub-task. We hope that there will be another opportunities to work together on advanced noise
suppression technologies for future aircraft engine systems. We would be pleased to be at your
5. 5
disposal at any time.”
List of references
On request and after consult I can give you a list of colleagues and references within the aeroacoustics
aerospace and gas turbine community (research establishments, universities and industry), where you
can inform about my former work and their assessment of it (quality, work efficiency, relevancy for
the field and “social quality”).