Book Section records
https://feeds.library.caltech.edu/people/Penner-S-S/book_section.rss
A Caltech Library Repository Feedhttp://www.rssboard.org/rss-specificationpython-feedgenenTue, 16 Apr 2024 14:06:26 +0000The thermal theory of constant-pressure deflagration for first-order global reactions
https://resolver.caltech.edu/CaltechAUTHORS:20091221-143436496
Authors: {'items': [{'id': 'von-Kármán-Th', 'name': {'family': 'von Kármán', 'given': 'Th.'}}, {'id': 'Penner-S-S', 'name': {'family': 'Penner', 'given': 'S. S.'}}]}
Year: 1954
The one-dimensional thermal theory of constant-pressure deflagration has been discussed in a recent publication by the senior author and G. Millán. In this paper an explicit relation was given for the linear burning velocity in flames supported by first-order global reactions. It is the purpose of the present analysis to extend this work by dropping the assumptions (a) that the average molecular weight of the gas mixture remains constant, and (b) that the thermal conductivity is constant. As the result, the one-dimensional theory of constant-pressure deflagration described in this paper is complete except in so far as the following reasonable approximations are concerned: (a) a constant average specific heat equal to the ratio of heat release per gram of reactant to total temperature rise may be used; (b) the ideal gas law constitutes a satisfactory equation of state for reacting gas mixtures.https://authors.library.caltech.edu/records/c7mcb-zpk92Spectroscopic studies of premixed laminar flames
https://resolver.caltech.edu/CaltechAUTHORS:20091221-152152667
Authors: {'items': [{'id': 'Penner-S-S', 'name': {'family': 'Penner', 'given': 'S. S.'}}]}
Year: 1954
A critical review is presented of the results obtained by spectroscopic observations on flames. The objective of the survey is to examine the status, promise, and deficiencies of combustion spectroscopy in its relation to (a) elucidation of the mechanism of combustion and (b) the solution of technical combustion problems. Since important spectroscopic studies have been carried out on low-pressure flames, a discussion of the probable effects of pressure on laminar flame propagation is also included.https://authors.library.caltech.edu/records/0z9mx-xy411Fundamental approach to laminar flame propagation
https://resolver.caltech.edu/CaltechAUTHORS:20091221-144345839
Authors: {'items': [{'id': 'von-Kármán-Th', 'name': {'family': 'von Kármán', 'given': 'Theodore'}}, {'id': 'Penner-S-S', 'name': {'family': 'Penner', 'given': 'S. S.'}}]}
Year: 1954
The complete system of equations for a theory of laminar flame equations is presented, taking into account both heat conduction and diffusion, for the case of an arbitrary number of simultaneous reactions. The eigenvalue problem determining the flame velocity is formulated. Two examples are given in order to show that explicit analytical expressions for the flame velocity can be obtained, which are in good agreement with the results obtained by numerical integration of the equations. In the first example (hydrazine decomposition) one reaction is considered as global, i.e., rate-controlling, reaction. In the second example (ozone decomposition) a hypothesis is introduced for the concentration of the free radical O, which corresponds to the steady-state approximation generally used in classical chemical kinetics. In both cases approximate explicit formulae are obtained for the flame velocity using legitimate approximation methods, without making drastic assumptions. The steady-state assumption used for the ozone flame has a bearing on a better understanding of the mechanism of chain reactions in general. The method indicated in the paper gives hope that the more complicated chain reactions, such as the combustion of hydrocarbons, will also be made accessible to theoretical computation.https://authors.library.caltech.edu/records/6gdv3-bpn38Studies of the decomposition mechanism, erosive burning, sonance and resonance for solid composite propellants
https://resolver.caltech.edu/CaltechAUTHORS:20110113-091252752
Authors: {'items': [{'id': 'Schultz-R', 'name': {'family': 'Schultz', 'given': 'R.'}}, {'id': 'Green-L-Jr', 'name': {'family': 'Green', 'given': 'L., Jr.'}}, {'id': 'Penner-S-S', 'name': {'family': 'Penner', 'given': 'S. S.'}}]}
Year: 1958
Recent experimental and theoretical studies on the decomposition mechanism, erosive burning, sonance and resonance for solid composite propellants are described. An
attempt has been made to discuss recent advances and to define important areas where additional studies are needed.https://authors.library.caltech.edu/records/9697s-2bp21Relations between molecular gas absoptivities and emissivities
https://resolver.caltech.edu/CaltechAUTHORS:20110124-084010424
Authors: {'items': [{'id': 'Penner-S-S', 'name': {'family': 'Penner', 'given': 'S. S.'}}, {'id': 'Olfe-D', 'name': {'family': 'Olfe', 'given': 'D.'}}, {'id': 'Thompson-A', 'name': {'family': 'Thompson', 'given': 'A.'}}]}
Year: 1959
Theoretical expressions have been derived for the relations
between gas absorptivities and emissivities for
the limit of zero optical depth and for the following
models of vibration-rotation bands: bands with constant
average absorption coefficients and well-defined widths;
just-overlapping spectral lines; non-overlapping dispersion
lines with constant collision half-width and either
regular line spacing or with lines of equal intensity;
randomly distributed spectral lines with dispersion contom;
non-overlapping Doppler lines with either regular
line spacing or with lines of equal intensity; randomly
distributed Doppler lines for a special {unrealistic} assumption
relating to the temperature dependence of the
effective mean line spacing; non-overlapping spectral
lines with combined Doppler and collision broadening,
constant collision half-width and either regular line
spacing or with lines of equal intensity. The theoretical
formulae have been shown to provide a good correlation
for the available experimental data on CO_2, H_2O and CO.https://authors.library.caltech.edu/records/5w39c-k8w79Spectroscopy methods of temperature measurements
https://resolver.caltech.edu/CaltechAUTHORS:20110125-105124057
Authors: {'items': [{'id': 'Penner-S-S', 'name': {'family': 'Penner', 'given': 'S. S.'}}]}
Year: 1962
N/Ahttps://authors.library.caltech.edu/records/wpbnb-bsv04Recent studies on quantitative spectroscopy and gas emissivities
https://resolver.caltech.edu/CaltechAUTHORS:20110204-080105852
Authors: {'items': [{'id': 'Penner-S-S', 'name': {'family': 'Penner', 'given': 'S. S.'}}, {'id': 'Olfe-D-B', 'name': {'family': 'Olfe', 'given': 'D. B.'}}, {'id': 'Lapp-M', 'name': {'family': 'Lapp', 'given': 'M.'}}]}
Year: 1963
Representative theoretical and experimental studies relating to the determination of gaseous radiation from isothermal systems are discussed. The following recently concluded studies are described: f-number measurements for OH behind shock fronts; a method for the direct determination of radiative and collisional life times of vibrationally excited, molecules; emissivity calculations for CO_2; emissivity calculations for a hydrogen plasma
at temperatures up to about 10,000°K.https://authors.library.caltech.edu/records/kkmm9-pnf61Similarity parameters for radiative energy transfer in isothermal and non-isothermal gas mixtures
https://resolver.caltech.edu/CaltechAUTHORS:20110127-120321921
Authors: {'items': [{'id': 'Penner-S-S', 'name': {'family': 'Penner', 'given': 'S. S.'}}, {'id': 'Thomas-M', 'name': {'family': 'Thomas', 'given': 'M.'}}, {'id': 'Adomeit-G', 'name': {'family': 'Adomeit', 'given': 'G.'}}]}
Year: 1964
The similarity groups for multicomponent, reacting gas mixtures with radiative
energy transport are derived (Section I). The resulting relations are used to consider
the feasibility if scaling for flow processes with radiative energy transport under
highly simplified conditions (Sections 2 and 3). Next the scaling parameters are
derived for radiant energy emission from isobaric and isothermal gases for
arbitrary opacities and various spectral line and molecular band models (Section 4).
Scaling parameters for radiant energy emission from isobaric but non-isothermal
systems are discussed for arbitrary opacities and various spectral line and molecular
band models under the restrictions imposed on the allowed temperature profiles for
dispersion and Doppler lines by the Eddington-Barbier approximation (Section 5).
Finally, we consider the radiative scaling properties for representative
temperature profiles for both collision-broadened and Doppler-broadened line
profiles on the basis if exact numerical calculations that we have performed for a
rotational spectral line belonging to a molecular vibration-rotation band. (Section
6). It appears that simple scaling rules generally constitute a fair approximation
for dispersion lines in non-isothermal systems but that corresponding relations
apply to lines with Doppler contour only in the transparent gas regime.https://authors.library.caltech.edu/records/46ese-ach16